Dr. Emmett Brown: Hey, kid! You'd better pick up your mom and get going.
Marty McFly: Yeah... right.
Dr. Emmett Brown: You look a little pale, are you okay?
Marty McFly: Yeah... I dunno, Doc. I mean, it's just this whole thing with my mother.
Dr. Emmett Brown: What? What? What? What? What?
Marty McFly: I just don't know if I can go through with it... hitting on her.
Dr. Emmett Brown: Nobody said anything about hitting her! You've just got to take a few liberties with her.
[he winks]
Marty McFly: See! That's what I mean - I mean, god! I c-can't believe I'm actually gonna feel up my own mother. You know this is the sort of thing that could screw me up permanently. Well what if I go back to the future and I end up being...
[he moves his hands around]
Marty McFly: ... gay?
Dr. Emmett Brown: Why shouldn't you be happy?

...the Senate is expected to vote on this today. In other news, officials at the Pacific nuclear research facility have denied the rumor that a case of missing plutonium was, in fact, stolen from their vault two weeks ago. A Libyan terrorist group had claimed responsibility for the alleged theft. However, officials now attribute the discrepancy to a simple clerical error. The FBI, which is still investigating the matter, had no comment. Twelve wooden crates filled with cocaine washed ashore near Boca Raton, Florida, yesterday.

TV news anchor

Dr. Emmett Brown: Let me show you my plan for sending you home. Please excuse the crudity of this model, I didn't have time to build it to scale or to paint it.
[reveals intricate tabletop model of the town square]
Marty McFly: [impressed] It's good.

Stella! Another one of these damn kids jumped in front of my car! Come on out here and help me take him in the house!

Sam Baines

[holding Marty's video camera] No wonder your president has to be an actor, he's gotta look good on television.

Dr. Emmett Brown

George McFly: Lorraine, my density has bought me to you.
Lorraine Baines: What?
George McFly: Oh, what I meant to say was...
Lorraine Baines: Wait a minute, don't I know you from somewhere?
George McFly: Yes. Yes. I'm George, George McFly. I'm your density. I mean... your destiny.

Lorraine Baines: Our first television set. Dad just picked it up today. Do you have a television?
Marty McFly: Well, yeah! You know we have... two of them.
Milton Baines: Wow! You must be rich!
Stella Baines: Oh, honey, he's teasing you. Nobody has two television sets.

Last night, Darth Vader came down from planet Vulcan and told me that if I didn't take Lorraine out that he'd melt my brain.

George McFly

Marty McFly: Wait a minute, Doc. Ah... Are you telling me you built a time machine... out of a DeLorean?
Dr. Emmett Brown: The way I see it, if you're gonna build a time machine into a car, why not do it with some style?

Dr. Emmett Brown: What on Earth's this thing I'm wearing?
Marty McFly: Ah, this, this is a radiation suit.
Dr. Emmett Brown: Radiation suit? Of course, because of all the fallout from the atomic wars.

Jesus, George, it's a wonder I was ever born.

Marty McFly

Mr. Strickland: I noticed your band is on the roster for the dance auditions after school today. Why even bother, McFly? You don't have a chance, you're too much like your old man. No McFly ever amounted to anything in the history of Hill Valley!
Marty McFly: Yeah, well, history is gonna change.

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Back to the Future Quotes

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?

[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]