Back to the Future (1991) s02e10 Episode Script
73411 - My Pop's an Alien
(THEME MUSIC PLAYING) MAN: (SINGING) Tell me, Doctor, where are we going this time? Is this the '50s Or 1999? All I wanted to do Was play my guitar and sing So take me away I don't mind But you better promise me I'll be back in time Gotta get back in time I'll be back in time Gotta get back in time AUTOMATED VOICE: Dr.
Brown.
Come in, Dr.
Brown.
Great Scott! They're here! They're here! Those science-fiction films from the '30s, '40s and '50s I ordered are finally here! And they look fantastic on my mega-screen TV.
Greetings cinema lovers.
Dr.
Emmett L.
Brown here to demonstrate that you can't always believe what you see.
It is astounding how these films caused millions of people to believe that flying saucers and alien spacecraft actually exist.
There was even a time when most of Hill Valley was certain that they did.
And it was all related to a bonafide astronomical event.
(CAR ENGINE ROARS) (CHUCKLES) I always was good at parallel parking.
Boys, the universe is an amazing place and this telescope lens will open your eyes to new worlds of wonderment.
On sale for only, uh, $192.
$192! That's my allowance for the next (MOUTHING) Uh, long time.
One hundred and ninety-two weeks.
The magnification capabilities of this lens will most dramatically improve our viewing of the comet Kahooey.
And we could use it to spy on neighbors, too.
Aah! It's a alien! Hiya, Verne.
Doc sent me to tell you squirts not to buy any of this overpriced junk.
I have to eat.
Your dad's already invented something for viewing tonight's comet.
(DOOR OPENS) BIFF: Hey, Mr.
Wonderment, my son wants a telescope.
How much for this one? That would be $999.
95.
Well, I got the 95 cents.
Put the rest on credit.
(SHATTERS) Man, it's busted! Hey, I'm not buyin' any defected merchandise.
I want my money back! Perhaps I could interest you in something even more powerful, but for less money.
Nothing's too good for my kid, as long as it's cheap.
What I have here is a very magical and sophisticated apparatus.
I call it the Galaxy Viewfinder 500.
Whoa! What's it do? For a mere $10 Wait a minute, how come so inexpensive? (SCOFFS) What a chump.
Uh, the GV-500 is on special discount for tonight's comet, the mighty Kahooey! I'll take two if ya got 'em.
Kahooey! Gesundheit! Uh, did he say the comet Kahooey was coming? Doy! What was your first clue? Kahooey! Kahoeey! Ka-ka-ka-bla-bla! Kahooey! Whoo! Whoo! Whaa! I gotta change my shoes! (TALKING HYSTERICALLY) Gotta! Gotta Kahooey! I got I gotta go shopping.
It's coming.
Kahooey! Help me! It's comet Kahooey! The aliens are coming again! (TIRES SCREECHING) (CRASHING) Aliens! I've seen them with my own two ears! (SCREAMING) Aliens! Aliens! Aliens? How unique.
I'm on the scene in Hill Valley, but so far see no sign of the reported Aliens! Get out of town while you still can.
Women, children and people with flattops first Hey, I seen you on TV.
You're good.
(SCREAMS) (CHAOTIC CLAMOR) A quick analysis of this situation indicates that mass hysteria is affecting the population.
Hey, mister! Aren't you scared of the alien attack? Oh, you bet.
That's why I'm getting outta town on the next bus.
Should be here in two-and-a-half hours.
Had the same kind of trouble comet Kahooey came by.
Real strange things happened.
Buses ran late, spooky lights, weird noises (METALLIC WHINING) (EXCLAIMS) Like that! Tannen was right, they're back! (PLAYING) No, that's just me and my harmonica.
(GROANS) Anyway, the whole town became a giant magnetic field.
Oh, looks like my bus is early.
Did anybody ever actually see a alien live in person? Ah, only Biff Tannen.
But his word's good enough for me.
(CHUCKLES) Who'd believe that nut? Aliens! Aliens are coming! Help, somebody! Help! Help! (SINGING) Old Biff Tannen saw an alien E-I-E-I (SCREAMS) That was some bump at the duck.
Spaceship! The same one! The aliens are back! (SCREAMS) DOC: (SINGING) Fly me to the moon And let me play among the stars (VEHICLE HONKING) Why, Mr.
Tannen! Brown, I got two things to tell you.
I'm returning your tractor, 'cause I wanna tie up loose ends, considering we're all gonna be obliterated.
Why, whatever do you mean? That's the second thing.
Aliens are here! And I don't mean the movie! Aliens? (GRUNTS) (GROANS) (GROANS) Oh! My achin' brain.
Ah, anyways, I just found their spaceship in your field, behind some oleander bushes.
Yes, the oleander bushes, that's where I keep it! You? You? You're the alien! I'm callin' the police, the air force, the And William Shatner! (SCREAMS) (PHONE RINGS) SHERIFF TAYLOR: Sheriff's department.
Sorry, can't talk now.
Due to the imminent alien attack, we're in the process of moving our office to another town where it's safe.
(STUTTERS) I Holy baloney! We'll be right there! Well, what is it, Sheriff Taylor? Biff Tannen says the alien's holed up at Doc Brown's place! Biff Tannen? He's the town alien expert, he should know! We'll need help on this one! (BEEPING) You are surrounded.
Come out with your hands up, or tentacles, or feeler thing-a-ma-bobs, or whatever you got.
Halt your vehicle! Hey, what's goin' on? This is my house, jarhead! Sorry, sonny, but we've got some alien holed up inside.
Cool! Ya gonna blow it to smithereens? Brother, I'm sure they plan to converse with the creature and learn the secrets of space travel.
No, I think we're gonna blow it to smithereens.
Better stand back.
If you do not surrender immediately, we will be forced to attack.
There seems to be a little misunderstanding.
(SCREAMS) It's too horrible! (GROANS) All right, you You creature, don't move a muscle, or we'll blast you back into outer space! Doc may be a little strange at times, but he's definitely no alien.
We've gotta help Pop.
But, brother, we cannot take on the entire Hill Valley militia single-handedly.
Hey, there's three of us! This business with the aliens appears to have started Therefore, the most prudent plan would be to go back to 1967 and find out what really happened.
MARTY: Hey, come on, let's blast to the past! Marty, Jules, it is a alien! No way, Vernie, that That's just a hippie.
Eh, people looked like this in the '60s.
What ridiculous hair! Look who's talking.
(SQUEAKY BARKING) Hey, check it out! JULES: The entire vicinity has been magnetized.
(METALLIC WHINING) There's that freaky noise! And it's not my harmonica! (MARTY SCREAMS) Whoa, better than hoverboarding! (SCREAMS) Hey, buddy, you forgot the zip code (SCREAMS) Hey, this mail wants to deliver itself.
We must save Martin! Oh, gee, guys, I always wanted to travel first class.
(BRAKES SCREECHING) (HORN HONKING) Move it, will ya? It's gonna turn green any second.
(LIGHTS DINGING) VERNE: The lights are all screwy.
Hey, what's goin' on? Oh, now my seat's all sticky.
Jiminy Christmas! Everything's happenin' just like the old dude said.
Yeah, but he didn't say anything about us almost bein' flattened.
I suggest we follow Mr.
Tannen in hopes of solving this mystery.
Whoa! Was that spooky or what? (SCREAMS) Greetings! I know what you are.
I seen it on Monster Chiller Theater.
You're a alien! This is unbelievable.
Eh, it's Doc! He He really is from outer space.
Cool! That means we are part alien.
JULES: And it would explain his vast knowledge in the area of science and time travel.
Hey, if we're aliens, does that mean we don't gotta go to school? MARTY: Forget school.
Biff's gonna be back here with the cops.
Yes, even if he is a space invader, he's our father and we must keep him out of trouble.
Hey, ah, maybe we can move his UFO out of the road.
I wonder if this thing runs on regular or unleaded.
Ooh, what I wouldn't give to dismantle this baby in the interest of science, of course.
DOC: (SINGING) Fly me to the moon Cheezit, he's comin' back! Sail upon the stars Now to prepare for take off For Jupiter and Mars (MACHINE POWERING UP) We're being shanghaied into outer space! VERNE: Mom's gonna be mad when we're late for supper.
That is, unless we are supper! Ah, everything is set for my rendezvous with comet Kahooey.
We are obviously over-matched by father's superior alien intelligence.
Oh, I don't know about that, but you can bet he'll be able to outsmart us.
Excuse me, Mr.
Alien, but you passed our bus stop.
(SCREAMS) (BOTH SCREAM) How did you youngsters get onboard? Oh, please! Please, don't take us to Mars and And turn us into zombie slaves, or use our brains for pencil erasers! Whatever are you talking about? Aren't you a alien? Nonsense.
My name is Emmett Brown, noted scientist of Hill Valley, California.
Right.
And I'm Michael J.
Fox, noted movie star of Hollywood, California.
Who? If you were a Earthling, you would know who that is.
Brother, remember this is 1967.
Oh, yeah.
Skip it.
If I might venture an explanation for you boys, this flying saucer is my own invention.
Constant pedaling creates a reverse magnetic charge.
Thus repelling the craft from the Earth's surface.
Brilliant.
Hey, that explains why everything in town was magnetized! I think.
Up here there are no big city lights to interfere with viewing the comet Kahooey.
Uh, how about the, uh, extraterrestrial duds? Merely a self-cooling suit.
You build up quite a sweat riding a bike.
(CLANKING SOUND) What's that, Pop? What pop? Uh, that bizarre popping noise.
Oh, that's just the bike chain rubbing against the frame.
Perhaps a little oil would help.
Ah, no problem.
Eh, this'll take care of it.
No! (RUMBLING) Did Did I use too much oil? No, too much acid! That's a compound for dissolving metals.
Prepare for a crash landing! (ALL SCREAM) (SIGHS) Sorry about your ship, Dr.
Brown.
Oh, that's quite all right.
The old legs were starting to cramp up anyway.
Ta-ta and enjoy the comet.
JULES: I knew father was no alien.
Yeah.
But we gotta keep Biff from flippin' out, so those military meatheads in the future won't pulverize your Pop.
Hey! Hey, wait a minute.
Does Doc still have those bee-keeper suits in the DeLorean? What are you starin' at? You do sorta look like that J.
Michael Fox guy.
Ah, Alaska's nice this time of the year.
Or, uh, maybe the North Pole.
Anywhere but where them aliens are! (SCREAMS) MARTY: Where do you think you are going, Earthling? Well, uh, I was thinking Alaska, or maybe the North Pole (SOBBING) VERNE: Quit your cryin', baby.
Yes Yes, sir, uh, ma'am.
What Whatever.
We have come to take you with us, Biff Tannen.
(STAMMERS) Why me? JULES: We wish to study the least intelligent creature on Earth.
No! Ah-ah, no, there's gotta be somebody dumber than me.
Uh, in school I got a F-plus! We're gonna use your brain for a very small pencil eraser! No! Don't take me! Please, please, pretty please with salt on top! MARTY: You may stay, if you promise never to mention our visit to your Earth.
Oh, you got it! Oh, great sultan of space! And in 25 years, you must promise not to notify the authorities.
And tell 'em Pop, uh, anybody's a alien.
I cross my heart and hope to live.
I promise! MARTY: Our work here is done.
Eh, may the force be with you.
They didn't take me? I'm alive! Oh, hooray for me! Well, huh, that should do it.
Let's jet to the future and make sure Pop's okee-ma-dokee.
VERNE: I don't see any of those government geeks.
MARTY: (CHUCKLES) Our trick must've worked! Eh, Biff didn't tell anybody, so nobody thinks Doc's an alien.
(SINGING) Fly me to the moon And let me play among the stars Let me see what love is like on Jupiter and Mars In other words MARTY: Doc! JULES: Father.
VERNE: Pop! DOC: Hello, boys.
I want to show you my new telescope hat I fabricated for viewing the comet Kahooey.
Try it on, Marty.
Uh, great, Doc, but I take a size seven and an eighth.
At one time I had a flying observatory.
I used to keep it in the oleander bushes, but it disappeared years ago.
Try lookin' in the swamp? DOC: Great Scott! There it is! How did you know, Vernie? Uh, lucky guess? (CHUCKLES) As I recall, a youngster by the name of Michael J.
Something-or-other caused this chain to snap.
Hey, Doc, let me run into town and pick up a new one.
Come on, punks.
Hurry back, boys! The comet will be here shortly! MARTY: The 24-hour Hill Valley bike hut will have a chain.
Hey, looky! It's Biff.
Meet the man the aliens said was too smart! For $5, I will tell of my close encounter with creatures from another planet.
What a nut.
(BRAKES SCREECHING) Hey, Biffster, I thought you weren't supposed to talk about meeting the aliens.
They don't scare me Hey, hey, how'd you know what they told me? That's what they tell everybody.
DOC: If Biff had truly been kidnapped by aliens, they would have concluded there was no intelligent life here and left anyway! (CHUCKLES) Fool you? I use this when I go for more popcorn, so I don't lose my seat.
What you see isn't always what it appears to be.
For instance, there's no evidence that flying saucers exist.
Yet, thousands of people think that they've seen them.
Why? Access video encyclopedia section "O" for optical illusions.
AUTOMATED VOICE: Section O.
Entry, optical illusions.
DOC: In interpreting what we see, our eyes rely not only on light, but on context and experience.
We can create pictures which fool our eyes into seeing things which aren't really there.
For example, take a look at this picture.
Which horizontal line is longer? The top or bottom? Fooled you! They're actually exactly the same length.
The angle in the arrows makes the upper line appear longer.
Here's an optical illusion you can make for yourself.
You'll need two matching squares of cardboard, a pencil, and some tape.
Draw a bird on one piece of cardboard.
On the other draw a cage.
Now, tape both boards to the pencil so that the bird faces one way and the cage the other way.
Rapidly rotate the pencil between your hands.
As the boards spin the bird appears to be inside the cage.
Why? This phenomenon is called "persistence of vision.
" The human eye can only register 12 pictures a second as separate images.
Since these images change faster than that, your brain sees them as merging together into one picture.
If you don't happen to have any paper, you can do the same thing with a marker, a t-shirt, and a school chair.
Of course, it does tend to make you rather dizzy.
(GASPS) Yoogstar! Aliens zapped my Flux Capacitor with a death ray! I leapt from the DeLorean and I'm falling through time! And if you believe that, I have an over-hydrated flood plain in Florida to sell.
DIRECTOR: Cut.
Ten.
That's a take.
We're all done, Doc.
Thanks, Fiji.
You see, this is merely another optical illusion created at the local Hill Valley television station.
So don't always trust your eyes.
Trust your brain.
DIRECTOR: Okay, boys, that's a wrap.
DOC: Hey! Who turned out the lights? Here's another situation in which you can't trust your eyes.
With any luck, I'll see you in the future! (THEME MUSIC PLAYING)
Brown.
Come in, Dr.
Brown.
Great Scott! They're here! They're here! Those science-fiction films from the '30s, '40s and '50s I ordered are finally here! And they look fantastic on my mega-screen TV.
Greetings cinema lovers.
Dr.
Emmett L.
Brown here to demonstrate that you can't always believe what you see.
It is astounding how these films caused millions of people to believe that flying saucers and alien spacecraft actually exist.
There was even a time when most of Hill Valley was certain that they did.
And it was all related to a bonafide astronomical event.
(CAR ENGINE ROARS) (CHUCKLES) I always was good at parallel parking.
Boys, the universe is an amazing place and this telescope lens will open your eyes to new worlds of wonderment.
On sale for only, uh, $192.
$192! That's my allowance for the next (MOUTHING) Uh, long time.
One hundred and ninety-two weeks.
The magnification capabilities of this lens will most dramatically improve our viewing of the comet Kahooey.
And we could use it to spy on neighbors, too.
Aah! It's a alien! Hiya, Verne.
Doc sent me to tell you squirts not to buy any of this overpriced junk.
I have to eat.
Your dad's already invented something for viewing tonight's comet.
(DOOR OPENS) BIFF: Hey, Mr.
Wonderment, my son wants a telescope.
How much for this one? That would be $999.
95.
Well, I got the 95 cents.
Put the rest on credit.
(SHATTERS) Man, it's busted! Hey, I'm not buyin' any defected merchandise.
I want my money back! Perhaps I could interest you in something even more powerful, but for less money.
Nothing's too good for my kid, as long as it's cheap.
What I have here is a very magical and sophisticated apparatus.
I call it the Galaxy Viewfinder 500.
Whoa! What's it do? For a mere $10 Wait a minute, how come so inexpensive? (SCOFFS) What a chump.
Uh, the GV-500 is on special discount for tonight's comet, the mighty Kahooey! I'll take two if ya got 'em.
Kahooey! Gesundheit! Uh, did he say the comet Kahooey was coming? Doy! What was your first clue? Kahooey! Kahoeey! Ka-ka-ka-bla-bla! Kahooey! Whoo! Whoo! Whaa! I gotta change my shoes! (TALKING HYSTERICALLY) Gotta! Gotta Kahooey! I got I gotta go shopping.
It's coming.
Kahooey! Help me! It's comet Kahooey! The aliens are coming again! (TIRES SCREECHING) (CRASHING) Aliens! I've seen them with my own two ears! (SCREAMING) Aliens! Aliens! Aliens? How unique.
I'm on the scene in Hill Valley, but so far see no sign of the reported Aliens! Get out of town while you still can.
Women, children and people with flattops first Hey, I seen you on TV.
You're good.
(SCREAMS) (CHAOTIC CLAMOR) A quick analysis of this situation indicates that mass hysteria is affecting the population.
Hey, mister! Aren't you scared of the alien attack? Oh, you bet.
That's why I'm getting outta town on the next bus.
Should be here in two-and-a-half hours.
Had the same kind of trouble comet Kahooey came by.
Real strange things happened.
Buses ran late, spooky lights, weird noises (METALLIC WHINING) (EXCLAIMS) Like that! Tannen was right, they're back! (PLAYING) No, that's just me and my harmonica.
(GROANS) Anyway, the whole town became a giant magnetic field.
Oh, looks like my bus is early.
Did anybody ever actually see a alien live in person? Ah, only Biff Tannen.
But his word's good enough for me.
(CHUCKLES) Who'd believe that nut? Aliens! Aliens are coming! Help, somebody! Help! Help! (SINGING) Old Biff Tannen saw an alien E-I-E-I (SCREAMS) That was some bump at the duck.
Spaceship! The same one! The aliens are back! (SCREAMS) DOC: (SINGING) Fly me to the moon And let me play among the stars (VEHICLE HONKING) Why, Mr.
Tannen! Brown, I got two things to tell you.
I'm returning your tractor, 'cause I wanna tie up loose ends, considering we're all gonna be obliterated.
Why, whatever do you mean? That's the second thing.
Aliens are here! And I don't mean the movie! Aliens? (GRUNTS) (GROANS) (GROANS) Oh! My achin' brain.
Ah, anyways, I just found their spaceship in your field, behind some oleander bushes.
Yes, the oleander bushes, that's where I keep it! You? You? You're the alien! I'm callin' the police, the air force, the And William Shatner! (SCREAMS) (PHONE RINGS) SHERIFF TAYLOR: Sheriff's department.
Sorry, can't talk now.
Due to the imminent alien attack, we're in the process of moving our office to another town where it's safe.
(STUTTERS) I Holy baloney! We'll be right there! Well, what is it, Sheriff Taylor? Biff Tannen says the alien's holed up at Doc Brown's place! Biff Tannen? He's the town alien expert, he should know! We'll need help on this one! (BEEPING) You are surrounded.
Come out with your hands up, or tentacles, or feeler thing-a-ma-bobs, or whatever you got.
Halt your vehicle! Hey, what's goin' on? This is my house, jarhead! Sorry, sonny, but we've got some alien holed up inside.
Cool! Ya gonna blow it to smithereens? Brother, I'm sure they plan to converse with the creature and learn the secrets of space travel.
No, I think we're gonna blow it to smithereens.
Better stand back.
If you do not surrender immediately, we will be forced to attack.
There seems to be a little misunderstanding.
(SCREAMS) It's too horrible! (GROANS) All right, you You creature, don't move a muscle, or we'll blast you back into outer space! Doc may be a little strange at times, but he's definitely no alien.
We've gotta help Pop.
But, brother, we cannot take on the entire Hill Valley militia single-handedly.
Hey, there's three of us! This business with the aliens appears to have started Therefore, the most prudent plan would be to go back to 1967 and find out what really happened.
MARTY: Hey, come on, let's blast to the past! Marty, Jules, it is a alien! No way, Vernie, that That's just a hippie.
Eh, people looked like this in the '60s.
What ridiculous hair! Look who's talking.
(SQUEAKY BARKING) Hey, check it out! JULES: The entire vicinity has been magnetized.
(METALLIC WHINING) There's that freaky noise! And it's not my harmonica! (MARTY SCREAMS) Whoa, better than hoverboarding! (SCREAMS) Hey, buddy, you forgot the zip code (SCREAMS) Hey, this mail wants to deliver itself.
We must save Martin! Oh, gee, guys, I always wanted to travel first class.
(BRAKES SCREECHING) (HORN HONKING) Move it, will ya? It's gonna turn green any second.
(LIGHTS DINGING) VERNE: The lights are all screwy.
Hey, what's goin' on? Oh, now my seat's all sticky.
Jiminy Christmas! Everything's happenin' just like the old dude said.
Yeah, but he didn't say anything about us almost bein' flattened.
I suggest we follow Mr.
Tannen in hopes of solving this mystery.
Whoa! Was that spooky or what? (SCREAMS) Greetings! I know what you are.
I seen it on Monster Chiller Theater.
You're a alien! This is unbelievable.
Eh, it's Doc! He He really is from outer space.
Cool! That means we are part alien.
JULES: And it would explain his vast knowledge in the area of science and time travel.
Hey, if we're aliens, does that mean we don't gotta go to school? MARTY: Forget school.
Biff's gonna be back here with the cops.
Yes, even if he is a space invader, he's our father and we must keep him out of trouble.
Hey, ah, maybe we can move his UFO out of the road.
I wonder if this thing runs on regular or unleaded.
Ooh, what I wouldn't give to dismantle this baby in the interest of science, of course.
DOC: (SINGING) Fly me to the moon Cheezit, he's comin' back! Sail upon the stars Now to prepare for take off For Jupiter and Mars (MACHINE POWERING UP) We're being shanghaied into outer space! VERNE: Mom's gonna be mad when we're late for supper.
That is, unless we are supper! Ah, everything is set for my rendezvous with comet Kahooey.
We are obviously over-matched by father's superior alien intelligence.
Oh, I don't know about that, but you can bet he'll be able to outsmart us.
Excuse me, Mr.
Alien, but you passed our bus stop.
(SCREAMS) (BOTH SCREAM) How did you youngsters get onboard? Oh, please! Please, don't take us to Mars and And turn us into zombie slaves, or use our brains for pencil erasers! Whatever are you talking about? Aren't you a alien? Nonsense.
My name is Emmett Brown, noted scientist of Hill Valley, California.
Right.
And I'm Michael J.
Fox, noted movie star of Hollywood, California.
Who? If you were a Earthling, you would know who that is.
Brother, remember this is 1967.
Oh, yeah.
Skip it.
If I might venture an explanation for you boys, this flying saucer is my own invention.
Constant pedaling creates a reverse magnetic charge.
Thus repelling the craft from the Earth's surface.
Brilliant.
Hey, that explains why everything in town was magnetized! I think.
Up here there are no big city lights to interfere with viewing the comet Kahooey.
Uh, how about the, uh, extraterrestrial duds? Merely a self-cooling suit.
You build up quite a sweat riding a bike.
(CLANKING SOUND) What's that, Pop? What pop? Uh, that bizarre popping noise.
Oh, that's just the bike chain rubbing against the frame.
Perhaps a little oil would help.
Ah, no problem.
Eh, this'll take care of it.
No! (RUMBLING) Did Did I use too much oil? No, too much acid! That's a compound for dissolving metals.
Prepare for a crash landing! (ALL SCREAM) (SIGHS) Sorry about your ship, Dr.
Brown.
Oh, that's quite all right.
The old legs were starting to cramp up anyway.
Ta-ta and enjoy the comet.
JULES: I knew father was no alien.
Yeah.
But we gotta keep Biff from flippin' out, so those military meatheads in the future won't pulverize your Pop.
Hey! Hey, wait a minute.
Does Doc still have those bee-keeper suits in the DeLorean? What are you starin' at? You do sorta look like that J.
Michael Fox guy.
Ah, Alaska's nice this time of the year.
Or, uh, maybe the North Pole.
Anywhere but where them aliens are! (SCREAMS) MARTY: Where do you think you are going, Earthling? Well, uh, I was thinking Alaska, or maybe the North Pole (SOBBING) VERNE: Quit your cryin', baby.
Yes Yes, sir, uh, ma'am.
What Whatever.
We have come to take you with us, Biff Tannen.
(STAMMERS) Why me? JULES: We wish to study the least intelligent creature on Earth.
No! Ah-ah, no, there's gotta be somebody dumber than me.
Uh, in school I got a F-plus! We're gonna use your brain for a very small pencil eraser! No! Don't take me! Please, please, pretty please with salt on top! MARTY: You may stay, if you promise never to mention our visit to your Earth.
Oh, you got it! Oh, great sultan of space! And in 25 years, you must promise not to notify the authorities.
And tell 'em Pop, uh, anybody's a alien.
I cross my heart and hope to live.
I promise! MARTY: Our work here is done.
Eh, may the force be with you.
They didn't take me? I'm alive! Oh, hooray for me! Well, huh, that should do it.
Let's jet to the future and make sure Pop's okee-ma-dokee.
VERNE: I don't see any of those government geeks.
MARTY: (CHUCKLES) Our trick must've worked! Eh, Biff didn't tell anybody, so nobody thinks Doc's an alien.
(SINGING) Fly me to the moon And let me play among the stars Let me see what love is like on Jupiter and Mars In other words MARTY: Doc! JULES: Father.
VERNE: Pop! DOC: Hello, boys.
I want to show you my new telescope hat I fabricated for viewing the comet Kahooey.
Try it on, Marty.
Uh, great, Doc, but I take a size seven and an eighth.
At one time I had a flying observatory.
I used to keep it in the oleander bushes, but it disappeared years ago.
Try lookin' in the swamp? DOC: Great Scott! There it is! How did you know, Vernie? Uh, lucky guess? (CHUCKLES) As I recall, a youngster by the name of Michael J.
Something-or-other caused this chain to snap.
Hey, Doc, let me run into town and pick up a new one.
Come on, punks.
Hurry back, boys! The comet will be here shortly! MARTY: The 24-hour Hill Valley bike hut will have a chain.
Hey, looky! It's Biff.
Meet the man the aliens said was too smart! For $5, I will tell of my close encounter with creatures from another planet.
What a nut.
(BRAKES SCREECHING) Hey, Biffster, I thought you weren't supposed to talk about meeting the aliens.
They don't scare me Hey, hey, how'd you know what they told me? That's what they tell everybody.
DOC: If Biff had truly been kidnapped by aliens, they would have concluded there was no intelligent life here and left anyway! (CHUCKLES) Fool you? I use this when I go for more popcorn, so I don't lose my seat.
What you see isn't always what it appears to be.
For instance, there's no evidence that flying saucers exist.
Yet, thousands of people think that they've seen them.
Why? Access video encyclopedia section "O" for optical illusions.
AUTOMATED VOICE: Section O.
Entry, optical illusions.
DOC: In interpreting what we see, our eyes rely not only on light, but on context and experience.
We can create pictures which fool our eyes into seeing things which aren't really there.
For example, take a look at this picture.
Which horizontal line is longer? The top or bottom? Fooled you! They're actually exactly the same length.
The angle in the arrows makes the upper line appear longer.
Here's an optical illusion you can make for yourself.
You'll need two matching squares of cardboard, a pencil, and some tape.
Draw a bird on one piece of cardboard.
On the other draw a cage.
Now, tape both boards to the pencil so that the bird faces one way and the cage the other way.
Rapidly rotate the pencil between your hands.
As the boards spin the bird appears to be inside the cage.
Why? This phenomenon is called "persistence of vision.
" The human eye can only register 12 pictures a second as separate images.
Since these images change faster than that, your brain sees them as merging together into one picture.
If you don't happen to have any paper, you can do the same thing with a marker, a t-shirt, and a school chair.
Of course, it does tend to make you rather dizzy.
(GASPS) Yoogstar! Aliens zapped my Flux Capacitor with a death ray! I leapt from the DeLorean and I'm falling through time! And if you believe that, I have an over-hydrated flood plain in Florida to sell.
DIRECTOR: Cut.
Ten.
That's a take.
We're all done, Doc.
Thanks, Fiji.
You see, this is merely another optical illusion created at the local Hill Valley television station.
So don't always trust your eyes.
Trust your brain.
DIRECTOR: Okay, boys, that's a wrap.
DOC: Hey! Who turned out the lights? Here's another situation in which you can't trust your eyes.
With any luck, I'll see you in the future! (THEME MUSIC PLAYING)