That's Strickland? Jesus. Didn't that guy ever have hair?

Marty McFly

Marty McFly: Calvin? Wh... Why do you keep calling me Calvin?
Lorraine Baines: Well, that is your name, isn't it? Calvin Klein? It's written all over your underwear.

Biff Tannen: And uh, where's my reports?
George McFly: Uh, well, I haven't finished those up yet, but you know I... I figured since they weren't due till...
Biff Tannen: Hello? Hello? Anybody home? Huh? Think, McFly. Think! I gotta have time to get 'em retyped. Do you realize what would happen if I hand in my reports in your handwriting? I'll get fired. You wouldn't want that to happen, would ya? Would ya?
George McFly: Of course not, Biff. I wouldn't want that to happen. Now, look. I'll finish those reports on up tonight and I'll run 'em on over first thing tomorrow. All right?

Biff Tannen: What are you looking at, butt head?
Skinhead: Hey Biff, get a load of this guy's life preserver. Dork thinks he's gonna drown.

Oh... one other thing. If you guys ever have kids and one of them when he's eight years old accidentally sets fire to the living room rug... go easy on him.

Marty McFly

Dr. Emmett Brown: Look. There's a rhythmic ceremonial ritual coming up.
Marty McFly: Of course! The Enchantment Under the Sea dance! They're supposed to go to this. That's where they kiss for the first time.
Dr. Emmett Brown: All right, kid. You stick to your father like glue and make sure he takes her to that dance.

Marty McFly: Do you mind if we... park... for a while?
Lorraine Baines: That's a great idea. I'd love to park.
Marty McFly: Huh?
Lorraine Baines: Marty, I'm almost 18 years old. It's not like I've never parked before.
Marty McFly: What?

Marty McFly: Lorraine, What are you doin'?
Lorraine Baines: I swiped it from the old lady's liquor cabinet.
Marty McFly: Yeah, well, you shouldn't drink.
Lorraine Baines: Why not?
Marty McFly: Because you... you might regret it later in life.
Lorraine Baines: Marty, don't be such a square. Everybody who's anybody drinks.
Marty McFly Geez! You smoke too?
Lorraine Baines: Marty, you're beginning to sound just like my mother!

Marty McFly: Mom... is that you?
Lorraine Baines: There, there now. Just relax.

Dr. Emmett Brown: Have them go on some sort of social...
Marty McFly: You mean like a date?
Dr. Emmett Brown: Right.
Marty McFly: Well, what kind of date? What do kids do in the '50s?
Dr. Emmett Brown: Well, they're your parents you must know them. What are their common interests? What do they like to do together?
Marty McFly: Nothing.

Hey, McFly. I thought I told you never to come in here.

Biff Tannen

George McFly: I know what you're gonna say, son. And you're right, you're right. But uh... Biff just happens to be my supervisor, and I'm afraid I'm just no good at... confrontations.
Marty McFly: The car, Dad. I mean he wrecked it. He totaled it. I needed that car tomorrow night, Dad. Do you have any idea how important this is to me? Do you have any clue?
George McFly: I know, And all I can say is... I'm sorry.

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Back to the Future Quotes

[Marty places headphones over his father's ears and wakes him up by playing Van Halen music at full blast. George wakes up screaming - Marty pauses the music. George looks up to see Marty, who is unrecognizable because he is wearing a radiation suit]
George McFly: Who are you?
Marty McFly: [after giving him another earful of loud rock music] Silence Earthling! My name is Darth Vader. I am an extraterrestrial from the planet Vulcan!
[makes Live Long and Prosper sign with his hand]

Younger Dr. Emmett Brown: [running out of the room] 1.21 gigawatts? 1.21 gigawatts? Great Scott!
Marty McFly: [following] What-what the hell is a gigawatt?