Lorraine Baines: Anyway, after Grandpa hit him, I...
Linda McFly: Yeah, yeah, we know. You felt sorry for him, so you decided to go with him to the Fish Under the Sea dance.
Lorraine Baines: No, no, it was the Enchantment Under the Sea dance.

Tardy slip for you, Miss Parker. And one for you, McFly. I believe that makes four in a row. Now let me give you a nickel's worth of free advice, young man. This so-called Dr. Brown is dangerous, he's a real nutcase. You hang around with him, you're gonna end up in big trouble.

Mr. Strickland

Marty McFly: Wait a minute, Doc. Ah... Are you telling me that 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?

[1955 Doc is watching a video of 1985 Doc]
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.

What if I send in the tape and they don't like it? I mean, what if they say I'm no good? What if they say "Get outta here, kid. You got no future."? I mean, I just don't think I can take that kind of rejection. Jesus, I'm starting to sound like my old man!

Marty McFly

[kissing George McFly on the head] See ya later, Pop. Whooo, time to change that oil.

Dave McFly

Goldie Wilson: [rushes up to George] Say! What do you let those boys push you around like that for?
George McFly: Well, they're bigger than me.
Goldie Wilson: Stand tall, boy. Have some respect for yourself. Don't you know if you let people walk over you now, they'll be walking over you for the rest of your life! Look at me. You think I'm gonna spend the rest of my life in this slop house?
Lou: Watch it, Goldie!
Goldie Wilson: No, sir! I'm gonna make something of myself. I'm going to Night School. And one day I'm gonna *be* somebody!
Marty McFly: That's right! He's gonna be mayor.
Goldie Wilson: Yeah, I'm gonna...
[smiles, one of his front teeth is gold]
Goldie Wilson: Mayor! Now *that's* a good idea! I can run for mayor.
Lou: A colored mayor, that'll be the day.
Goldie Wilson: You wait and see, Mr. Carruthers. I *will* be mayor! I'll be the most powerful man in Hill Valley. And I'm gonna clean up this town.
Lou: Good. You can start by sweeping the floor.
[hands Goldie a broom]
Goldie Wilson: [stands tall with a hand over his heart] Mayor Goldie Wilson. Like the sound of that.
[collects George's dishes]

[Dr. Emmett Brown is doubting Marty McFly's story about that he is from the future]
Dr. Emmett Brown: Then tell me, "Future Boy", who's President in the United States in 1985?
Marty McFly: Ronald Reagan.
Dr. Emmett Brown: Ronald Reagan? The actor?
[chuckles in disbelief]
Dr. Emmett Brown: Then who's VICE-President? Jerry Lewis?
[rushing out and down a hill toward his laboratory]
Dr. Emmett Brown: I suppose Jane Wyman is the First Lady!
Marty McFly: [following Doc] Whoa! Wait! Doc!
Dr. Emmett Brown: And Jack Benny is Secretary of the Treasury.
Marty McFly: [outside the lab door] Doc, you gotta listen to me.
Dr. Emmett Brown: [opens the door to the lab] I've had enough practical jokes for one evening. Good night, Future Boy!
[closes the door leaving Marty outside]
Marty McFly: No, wait! Doc. Doc. The-the-the bruise - the bruise on your head. I know how that happened! You told me the whole story. You were standing on your toilet, and you were hanging a clock, and you fell, and you hit your head on the sink. And that's when you came up with the idea for the Flux Capacitor...
[somberly]
Marty McFly: Which... is what makes time travel possible.
[Doc opens the door and looks at Marty with a stunned look on his face]

[talking about the Time Machine]
Marty McFly: [looks through a camcorder] This is uh... This is heavy duty, Doc. This is great. Uh, does it run, like, on regular unleaded gasoline?
Dr. Emmett Brown: Unfortunately no, it requires something with a little more kick - plutonium.
Marty McFly: Uh, plutonium? Wait a minute. Are-
[lowers the camcorder]
Marty McFly: Are you telling me that this sucker is nuclear?
Dr. Emmett Brown: Hey, hey, hey. Keep rolling. Keep rolling, there.
[Marty raises the camcorder]
Dr. Emmett Brown: No, no, no, no, no. This sucker's electrical. But I need a nuclear reaction to generate the 1.21 gigawatts of electricity I need.
Marty McFly: Doc, you don't just walk into a store and-and buy plutonium. Did you rip that off?
Dr. Emmett Brown: Shhhhhh. Of course. From a group of Libyan nationalists. They wanted me to build them a bomb, so I took their plutonium and in turn, gave them a shiny bomb-casing full of used pinball machine parts! Come on! Let's get you a radiation suit. We must prepare to reload.

[last lines]
Marty McFly: Doc, we better back up. We don't have enough road to get up to 88.
Dr. Emmett Brown: Roads? Where we're going we don't need roads.

This is heavy.

Marty McFly

Since you're new here, I-I'm gonna cut you a break... today. So, why don't you make like a tree and get outta here?

Biff Tannen

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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?