They really cleaned this place up, looks brand new.

Doc: Now remember, according to my theory you interfered with with your parent's first meeting.

They don't meet, they don't fall in love, they won't get married and they wont have kids.

That's why your older brother's disappeared from that photograph.

Your sister will follow and unless you repair the damages, you will be next.

Marty: This sounds pretty heavy.

Doc: Weight has nothing to do with it.

Doc: Which one's your pop?

Marty: That's him.

George: Okay...

...okay you guys...

...oh ha ha ha, very funny.

Hey you guys are being real mature.

Doc: Maybe you were adopted.

George: Okay, real mature guys.

Okay, Biff, will you pick up my books?

Strickland: McFly.

Marty: That's Strickland.

Jesus, didn't that guy ever have hair?

Strickland: Shape up, man.

You're a slacker. You wanna be a slacker for the rest of your life?

George: No.

Doc: What did your mother ever see in that kid?

Marty: I don't know, Doc, I guess she felt sorry for him cause her did hit him with the car...

...hit me with the car.

Doc: That's a Florence Nightingale effect.

It happens in hospitals when nurses fall in love with their patients.

Go to it, kid.

Marty: Hey George...

...buddy...

I've been looking all over for you.

You remember me, the guy who saved your life the other day.

George: Oh, yeah.

Marty: Good, there's somebody I'd like you to meet.

Lorraine.

Lorraine: Calvin!

Marty: I'd like you to meet my good friend George McFly.

George: Hi...

...it's really a pleasure to meet you.

Loraine: How's your head?

Marty: Well uh, good, fine.

Loraine: Oh, I've been so worried about you ever since you ran off the other night.

Are you okay?

I'm sorry I have to go.

Girl: Come on!

Isn't he a dream boat?

Marty: Doc, she didn't even look at him.

Doc: This is more serious than I thought.

Apparently your mother is amorously infatuated with you instead of your father.

Marty: Whoa, wait a minute, Doc, are you telling me that my mother...

...has got the hots for me?

Doc: Precisely.

Marty: Whoa, this is heavy.

Doc: There's that word again, heavy.

Why are things so heavy in the future. Is there a problem with the Earth's gravitational pull?

Marty: What?

Doc: The only way we're gonna get those two to successfully meet is if they're alone together.

So you've got to get your father and mother to interact at some sort of social...

Marty: What, well you mean like a date?

Doc: Right.

Marty: What kind of date?

I don't know, what do kids do in the fifties?

Doc: Well, they're your parents, you must know them.

What are there common interests. What do they like to do together?

Marty: Nothing.

Doc: Look!

...there's a rhythmic ceremonial ritual coming up.

Marty: Of course, the Enchantment Under The Sea Dance they're supposed to go to this...

...that's where they kiss for the first time.

Doc: Alright kid.

You stick to your father like glue and make sure that he takes her to the dance.