He does, and they put Jennifer down by the discarded laser discs.
Marty: OK, now what?
Doc: In exactly 2 minutes, you go round the corner into the Cafe 80's.
Marty: Cafe 80's?
Doc: One of those nostalgia places, but not done very well. Go in and order a Pepsi. Here's a 50. And wait for a guy named Griff.
Marty: Right, Griff.
Doc: Griff's going to ask you about tonight. Are you in or out? Tell him you are out! Whatever he says, whatever happens, say no, you're not interested.
Marty: OK.
Doc: Then leave, come back here and wait for me. Don't talk to anyone, don't touch anything, don't do anything, don't interact with anyone and try not to look at anything.
Marty: I don't get it, I thought you said this had something to do with my kids?
Doc gets out a newspaper.
Doc: Look what happens to your son!
He gives Marty the paper - USA Today Hill Valley Edition. The headline reads Youth Jailed For Attempted Robbery.
Marty: My son?
Marty looks at the picture.
Marty: God, he looks just like me. (reading from the paper) "Within two hours of his arrest, Martin McFly Junior was tried, convicted and sentenced to fifteen years in the State Penitentiary." (To Doc) Within two hours?
Doc: The justice system works swiftly in the future, now that they've abolished all lawyers.
Marty: This is heavy.
Doc: Oh, it gets worse! Next week your daughter attempts to break him out of jail and she gets set up for 20 years!
Marty: My daughter? Wait a minute, I have a daughter?
Doc: You see, this one event starts a chain reaction which completely destroys your entire family.
Marty looks at the paper again.
Marty: Hey Doc, this date.....wait, this is tomorrow's newspaper!
Doc: Precisely! I already went further ahead into time to see what else happens. I backtracked everything to this one event, that's why we're here today to prevent this incident from ever happening.
Doc's watch beeps.
Doc: Damn, I'm late!
Marty: Wait a minute, where are you going now?
Doc: To intercept the real Marty Junior, you're taking his place. Round the corner at the Cafe 80's, guy named Griff, just say no!
Marty: Hey, what about Jennifer? We're not just gonna leave her here?
Doc: Don't worry, she'll be safe, it'll just be for a few minutes.
Marty starts to walk off to do his mission.
Doc: Marty, be careful around that Griff character. (Doc puts his finger up to his head and makes a "he's loopy" sign as he says this) He's got a few short circuits in his bionic implants.
Marty walks out into Courthouse Square.
Marty: The future.
It's changed vastly. The Courthouse is still there, only it's now the Courthouse Mall. The clock is still at 10.04 though. Marty looks round. The road has "No Landing" painted on it. Flying cars are around and Marty can see the skyway from where he is standing. He looks around again and sees the "on ramp" between road and skyway. Cars are both entering and exiting the skyway. Looking at the Courthouse, he sees that instead of a car park, the central bit of the Square now has a pond and tropical plants. Marty turns around. The Texaco station has also changed!!! It's now 2 levels - one for hover-converted vehicles and one for ground cars.
Computerised Voice: (v.o) Welcome to Texaco. You can trust your car with the system with the star. Checking oil, checking landing gear.....
Marty looks over to the cinema. It's now called Holomax and Jaws 19 is showing, directed by Max Spielberg (Steven's real life son!!!). Marty looks away and a holo-shark comes out, creeping towards Marty. It's just about to "eat" him.
Marty: Argh!!!
The shark then disappears. Marty gets up, he's receiving some very strange looks.
Marty: Shark still looks fake.
A holo-billboard in the background "starts".
Goldie Wilson III: Hi friends, Goldie Wilson III here for Wilson's hover-conversion systems.. You know, when my grandpa was mayor of Hill Valley, he had to worry about traffic problems. But now, you don't have to worry about traffic! I'll hover-convert your old road car into a skyway flyer. For only $39,999.95. So come on down and see me, Goldie Wilson III, at any one of our 29 convenient locations. Remember, keep 'em flying.
Marty sees an antiques store, Blast from the Past. He looks in the window. Inside are Grey's Sports Almanac 1950-2000, a Jaws Nintendo game, an old Apple Mac (circa 1984), a Roger Rabbit doll, a lava lamp, a Dustbuster, Perrier water bottles, a Super VHS video camera, a Walkman, Dragnet and Animal House videos, the political comedy album Trust Me and as an in-joke, Marty's shirt and jacket from Part 1. Marty walks into the Cafe 80's next door, where Lou's Cafe was in 1955.
Music: Beat It By Michael Jackson
The layout of the Cafe is similar to Lou's Cafe. Behind the counter are TV screens playing shows of the 1980s - these are Family Ties, Miami Vice, Dallas, Cheers, The Oprah Winfrey Show, The Smurfs and Taxi. BIFF, now 78, is seen in the background. He doesn't see Marty, and Marty doesn't see him. The Cafe is decorated with various decorations from the 1980s. Two "cyclists" are inside pedalling on exercise bikes. There are no waiters or anything like that in the Cafe, just "video waiters". One of them, who looks like Michael Jackson, is talking to a woman customer who's sitting at the counter.
(Note: The following speech by "Michael Jackson" might not be accurate, I played the tape 5 times and this was the best I could come up with).
"Michael Jackson": .....or you might want to go south western with our Labunya Tortest peanuts, it's got a hot salsa, avocados, some natural mixture with your choice of beans, chicken, b..b..beef or pork.....
Cut to Marty. He's standing in the doorway looking puzzled/astonished.
Customer: (o.s) Waiter?