Kid Tannen's basement
Marty Jr. had been knocked out by the guards and had been out for about 6 hours. He woke up and realized he was somewhere trapped with no place to escape unless Jules, Verne, and Franny came here to try and escape.
Marty Jr.: Where am I? Wait a minute. I'm trapped here in Kid's basement. (turns on walkie talkie) Jules, Verne. Franny come in!
Jules: Martin! We tried contacting you three hours ago and you didn't answer.
Marty Jr.: I know. Kid Tannen knocked me out and trapped me in his mansion basement.
Jules: Great Scott! What about Griff?
Marty Jr.: He's talking to him about how to kill me and make Kid more famous and successful along with spreading alcohol over Hill Valley.
Jules: We're nearly done repairing the circuits and the fuel lines so once we're done we'll hop over there and break you free.
Marty Jr.: Be careful guys. Kid has guards around the place so it's going ot be very hard.
Jules: We'll figure out a way don't worry we'll be over there very soon. (turns walkie talkie off)
Marty Jr.: Man this is heavy.
Kid: Who were you talking to?
Marty Jr.: None of your business Kid!
Kid: Everything's my business Mr. Callahan! Now lets head over to the courthouse square now! Mr. Kassidy is awaiting our presence there!
Marty Jr.: Oh boy!
Outside of Hill Valley
Verne: There. All done. Now we can save Marty from Griff and Kid.
Jules: Great! To Kid Tannen's place!
While flying to the place, Jules spots Jr., Griff and Kid in front of the courthouse.
Jules: Do I see what I think I see Verne?
Verne: Let me see! (gasps) Great Scott! Griff and Kid are about to kill Marty! We gotta go down there and stop him!
Jules: Then let's get em!
They fly down to save him from Griff and Kid but land on top of the courthouse using a ladder to get down and back up later.
Griff: Now Callahan, let's get an answer here. Will you join us to take over Hill Valley or not?!
Marty Jr.: Absolutely not!
Griff: (punches him in the stomach) Wrong answer!
Marty Jr.: (kicks Griff) Right answer Kassidy!
Kid: Well you little brat, it's time for you to die in my hands. (points gun towards him)
Jules: Stop it you two!
Kid: Who are you guys?!
Marty Jr.: My friends! They're here to save me!
Griff: No! They can't do this to us! (gets him by a ball by Verne) Owww!
Verne: Your plans to screw up history for your own benefit are over!
Marty Jr.: Yeah Cletus it's over?
Verne: Cletus?
Griff: Yeah I'm Cletus Kassidy you fools!
Marty Jr.: And I'm Harry Callahan!
The police run over to stop them from killing each other.
Police 1: What's going on here Tannen?
Kid: Killing Mr. Harry Callahan over here for trying to ruin my life with Mr. Cletus Kassidy right here!
Police 2: Well Tannen and Kassidy, Callahan is trying to bring justice to Hill Valley!
Kid: We'll see about that once prohibition ends!
Griff: Prohibition will end sometime in the future!
Police 2: You don't know that!
Griff: I know everything what's going to happen in the future and I'm going to tell you right now!
Police 1: Ok tell us now!
Griff: In the future… (gets hit in the head by Marty Jr.) Owww!
Marty Jr.: Enough Cletus!
Griff: Never! (gets gun out)
Jules: (after sling shots Griff's gun) That's enough Kassidy! It's over!
Griff: Screw it! I give up! I'm leaving now! Nice meeting you Kid!
Kid: What! You can't do this! We need to kill these people!
Griff: I'm going back to where I came from or somewhere else if that's the case!
Kid: Alright then, make like a rock and skittdaddle! (heads back to his car to head back to his place)
Marty Jr.: Let's get outta here!
Then his great great grandpa William McFly came up to make sure they were alright.
William: You guys ok there?
Marty Jr.: Yeah we're ok.
William: I'm glad you're ok. That Tannen guy and the other gangster are killers and happy you guys didn't get killed.
Marty Jr.: I know but we have to get going now. See you later.
They head back up to the courthouse and get in their time machine flyers!
Griff: If Kid can't do it, then I'll head back to 1884 to have Buford Tannen assassinate you guys! He should be successful in getting rid of you guys!
Jules: That's what an idiot like you thinks!
Franny: Yeah! We'll meet you over there!
Griff takes off to March 18, 1884 which would be the day Buford Tannen successfully kills 12 men.
Marty Jr.: According to the tracker, he's in March 18, 1884. Something about that day is probably what Mad Dog did successfully in Hill Valley History.
Verne: That was the day that he killed 12 men, not including Indians or Chinamen.
Jules: Yeah and if Griff is successful at killing us, he'll likely get Buford into killing all of the citizens in Hill Valley along with burning the whole town down!
Marty Jr.: Ok March 18, 1884, 12:00 PM Hill Valley, California. Let's do this guys!
They take off in the air and enter temporal displacement into March 18, 1884 in Hill Valley, California.