Biff laughs as he pulls out a gun.
Biff: Funny, I never thought it would be you.
Marty: Yeah well Biff, you're forgetting one thing. What the hell is that?
He points behind Biff. Biff looks, and Marty throws the matchbox tray at him. It hits the chair just about Biff's head. Marty runs off. Biff turns back and sees him go. He fires at Marty and misses.
Biff: You're dead, you little son of a bitch!
Biff presses a button which calls for security. Marty runs out and sees the elevator. He runs to it, just as 3-D, MATCH and SKINHEAD come out of it.
3-D: Hey, get back here!
Match: Hey, hey!
Marty runs to the stairs and runs down them. The gang follows him. Marty switches to the other flight of stairs and climbs back up. Biff's cronies do not realise he's done this and carry on downwards. Marty, now back at the top of the stairs, goes out onto the roof. Biff enters. He sees the door to the roof closing and realises where Marty is. Marty runs to the edge of the roof and looks down. It's a long way down! Biff approaches him.
Biff: Go ahead, kid. Jump. Suicide'll be nice and neat.
Marty: What if I don't?
Biff gets a gun out and points it at Marty.
Biff: Lead poisoning.
Marty: What about the police, Biff? They're gonna match up the bullet with that gun.
Marty looks down again.
Biff: Kid, I own the police! Besides, they couldn't match up the bullet that killed your old man.
Marty: You son of a bitch!
Biff: I suppose it's poetic justice - two McFlys with the same gun.
Looking down again, Marty jumps off the roof. Biff looks at him with a "what the hell?" look and approaches the roof. He chuckles to himself. Then he sees Marty hovering in mid-air! It turns out that he's standing on the DeLorean.
Biff: (re: DeLorean) What the hell?
Doc opens the door of the car and it hits Biff on the head, knocking him out. Marty climbs in.
Marty: Nice one Doc! You're not going to believe this, we've got to go back to 1955!
Doc: I don't believe it!
The DeLorean flies away from the Pleasure Paradise. Cut to Marty and Doc inside. Doc is inputting the date in the time panel.
Marty: That's right, Doc. November 12th 1955.
Doc: Unbelievable, that old Biff could have chosen that particular date. It could mean that, that point in time inherently contains some sort of cosmic significance. Almost as if it were the junction point for the entire space-time continuum. On the other hand, it could just be an amazing coincidence.
The time display changes to JAN 01 1885 12.00AM.
Doc: Damn, gotta fix that thing!
He bangs it and it changes back to NOV 12 1955 06.00AM.
Doc: All right, time circuits on.
Marty: What do you mean, time circuits on? Doc, we're not going back now?
Doc: Yep.
Marty: Doc, what about Jennifer, what about Einstein? We can't just leave them here!
Doc: Don't worry Marty, assuming we succeed in our mission this alternative 1985 will be changed back to the real 1985, instantaneously transforming around Jennifer and Einie. Jennifer and Einie will be fine, and they will have absolutely no memory of this horrible place!
Marty: Doc, what if we don't succeed?
Doc: We must succeed!
The DeLorean arrives in 1955 outside the Lyon Estates billboard and lands behind it (One week ago Marty parked the car in exactly the same place!). Doc and Marty exit the car.
Marty: Ah, this is heavy Doc. I mean it's like I was just here yesterday.
Doc: You were here yesterday, Marty. You were. Amazing, isn't it?
Doc runs to the billboard, Marty follows.
Doc: All right, sunrise should be in about 22 minutes.
He goes back to the DeLorean.
Doc: You go into town, and track down Young Biff and tail him. Sometime today, Old Biff will show up and give young Biff the almanac. Above all you must not interfere with that event. You must let Old Biff believe he's succeeded so he'll leave 1955 and return the DeLorean back to the future.
Marty: Right.
Doc: Once Old Biff has gone, grab the almanac any way you can. Remember both of our futures depend on this!
Marty: You don't have to remind me of that, Doc!
Doc: Here's some binoculars and a walkie-talkie so we can keep in contact. I'll stay here and try to repair the shortened time circuits. That way we don't risk anyone else stealing the time machine, and I won't risk accidentally running into my other self.
Note: From now on, when Marty and Doc speak to each other through walkie-talkies, this will be denoted by (w.t).
Marty: Your other self?