The next day, Emmett sent Marty Junior to school, along with his dad. When they arrived, Mr. Strickland saw them. "Mr. McFly, you're early for once! Who is this guy who looks like you?" asked Strickland.
"This is my friend, Calvin Klein III. He's an exchange student from Canada." said Marty.
"Welcome, Mr. Klein. Make yourself at home. In this new school, you can take classes with your friend for now until we give you a proper schedule. Have a good day, And no slacking off!" said Mr. Strickland. The Martys then headed off to Marty Sr's first class. Marty Junior was shocked at the striking familiarity of some of the kids. Marty took his seat, in front of Jennifer. "Hey, Jen." Marty said. "sorry about yesterday. Calvin here-"
"I don't want to hear it Martin. You said you'd come, and you didn't!" said Jennifer.
"Guys, no need to fight. I think your relationship is density!" said Marty Junior.
"What? Density?" asked Jennifer.
"I mean destiny! Look, one little mishap can't end a perfect match like you two!" said Junior.
"Calvin has a point, Jen. You're acting too weird. Be strong. It's not the end." said Marty Senior.
"I am not!" said Jennifer.
"Are too!" Marty Senior said.
"Am not!"
"Are too!"
It was then that the teacher heard them arguing loudly, and said, "That's enough! McFly and Parker, I don't tolerate arguing. You both have detentions, and so does Klein here!"
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The rest of the day didn't go so well. Out of the 3 classes Marty had with Jennifer, he couldn't talk enough sense into her to make her understand why he hadn't been there. At lunch, Marty Junior told Jennifer to meet him at his house for a special surprise. That was a lie. Really, MJ would give Jennifer confidence in Marty Senior by doing a special play with him, some friends, and Emmett. The play would help Jennifer open up her feelings for Marty and like him again. However, they had detention to get through first. It was strange for Jennifer, but MJ and MS were no strangers to it.
After detention, Jennifer was surprised to see that MJ lived with Doc Brown. They all went inside, and Emmett made an announcement.
"Lady and gentleman," said Emmett. "Welcome to the Brown Theater! Tonight, we will be staging a performance of "Jealousy" by Calvin Martin Klein Junior. Let's welcome our actors! Let the show begin!" All the actors took their positions on stage. "Once upon a time," Emmett narrated. "There was a town called Mountain Plains." Everybody started decorating the fake stage with facades and other props, like window stickers. "Now, in this town lived a boy and a girl. The boy was named Arthur Cifly and the girl was named Emily Archer. They loved each other. One day, their school announced its dance." Emmett got off stage, and a boy and girl got on. They sat in chairs, and talked. The girl playing Emily said, "Oh, Artie, this may be our chance! To show people we're an official couple. I'm never going to think about Elliot again, what with you here!"
"Oh, Em, I can't wait to see you there! It's the 14th, right?" asked "Artie".
"Emily" nodded. "Yep- tomorrow night! See you there!" she said. The school bell rang, and the teens left. "The next day," Emmett said. "Artie was driving to pick up his tuxedo, when he saw his exact double!" Artie was then shown in his truck, gasping as he looked at his exact double- who had make-up on to hide the fact they weren't really doubles. The fake truck was connected to a doily. People offstage pushed the doily forwards, sending the truck into a Styrofoam pole. Artie played unconscious. Artie's double took Artie to a house. An old man answered.
"Doctor, help! This guy was in an accident! Help me revive him!" said Artie's double. Someone from backstage held up a timecard that read, "9 hours later." Then, Artie's double woke him up, and he talked to the doctor. Artie realized, "Ohno! My girlfriend was waiting for me at the dance, and when I didn't show up…noooooooooo!"
The final scenes consisted of Artie and his double, Carlin, miserably trying to get Emily to get back with Arthur. A card was held up. "It read, "To Be Continued!"
"This actually happened to my friend, Marty, here!" said Emmett as the curtains closed. "Come up, Marty, Jennifer, Calvin! Apologize to each other."
Jen and the Martys walked up. The apologies started.
"I'm sorry for startling you and making you miss the dance!" said MJ.
"I'm sorry for not coming when I said I would!" said Marty.
"I'm sorry for not believing you, getting emotional, and taking it the wrong way!" said Jen.
"Apology accepted!" said Marty. "Let's go out for pizza!"
"I'm in!" said Jennifer, as she and Marty walked out of Emmett's house.
Emmett looked at MJ, and said, "Mission accomplished!"