Inside the gym, both Marty and Ally were on the stage, playing electric guitars while they stared out in the crowd. They kept their eyes on their parents, who were dancing on the dance floor. Marvin watched them and nodded at them with an impressed expression on his face. He then walked over to the microphone that was at the front of the stage. "This is for all of you lovers out there," Marvin said into the microphone and he started singing Earth Angel.

Marty had taken that photo of him, Ally, Linda, and David and attached it to the neck of his guitar. Linda was completely gone from the photo, leaving him and Ally in the photo. The twins glanced at each other in fear, seeing that they had very little time left.

"George, aren't you gonna kiss me?" Lorraine asked George while she was dancing with him. George was a bit hesitant about doing it. "Gee, I don't know," he said, his voice a tad bit shaky from how nervous he was. He may have gathered the confidence to punch Biff, but he didn't have it to kiss Lorraine. Then, a ginger-haired patron cut in between them.

"Scram, McFly. It's my turn," he told George, pushing him back. When that happened, Marty wasn't playing the guitar right. He was starting to feel dizzy and he broke out in a sweat, getting a look from Marvin, who was still singing. Ally looked over when she saw this. Her heart sank when she saw Marty on the floor, looking distressed.

"Marty, what's wrong?" she asked, setting her guitar down instantly to her brother. "I can't play…" he said, finding himself unable to play his guitar. They looked over at the crowd, seeing that Lorraine was struggling to get back to George, who had his back facing her. Marty was slowly starting to disappear from the photo. Both him and Ally were in shock when they saw that his hand was starting to vanish.

'Dad, do something!' Ally thought in a panic, starting to shake when she saw Marty starting to vanish from existence. Before that happened, George stepped forward and approached the ginger-haired teen. "Excuse me," he said, pushing that kid over. He then took Lorraine in his arms, holding her face gently before he kissed her finally. Lorraine accepted the kiss right away. The second they did, Marty's strength came back and he was able to play the guitar again.

Both him and Ally stood straight up, watching their parents kiss with surprised yet relieved looks on their faces. Ally then glanced over at the photo on Marty's guitar and she patted Marty's shoulder. "Marty, look!" she said, getting his attention. He glanced over at it and saw that Linda and David had reappeared on it, solidifying that their mission had been accomplished.

"We did it…" Marty said, smiling big in relief. Ally hugged Marty in relief for a second while he looked over at his hand, which was solid. He even flexed his fingers to double check. They looked out in the crowd, seeing George holding Lorraine gently against him as they slowly danced. He raised his hand at them and he waved at them. Ally gave him a double thumbs up to praise him for his efforts.

They could finally rest easy and meet Doc back at the town square. Marty took off the guitar, and held it by the neck. When the song ended, the crowd on the dance floor was clapping and cheering. "That was really good! How about we play another one?" Marvin suggested, smiling widely.

"Actually, we gotta go," Marty said. "Yeah, tight schedule," Ally asked, itching to get back home. "C'mon, guys! Let's do something that really cooks!" Marvin suggested. When Marty and Ally looked at the crowd, they saw that they were clapping louder. They looked at each other, knowing that this was their time to shine.

"Marty, you thinking what I'm thinking?" Ally asked him, picking up her guitar and she looped the strap over her shoulders. "Yep," Marty said, going up to the microphone with Ally. "Alright, this is an oldie," he said to the crowd, but they didn't understand what he said. "What he means, it's an oldie from where we're from," Ally corrected, speaking into the microphone.

Marty turned to the other band members and he told them, "Alright guys, let's do some blue riffs in B, watch for the changes, and try to keep up, okay?" Marty and Ally both started to play the song Johnny B. Goode on their guitars, making the first opening riffs. The beat was so catchy that the patrons started to dance to the music.

Then, they both started singing the song into the microphone. The whole band was also getting into the song, smiling and dancing a bit too. The song was too catchy to resist.

"Way down in Louisiana, back in New Orleans

Way back up in the woods, among the evergreens

Stood a log cabin made of earth and wood

Where lived a country boy named Johnny B. Goode

Who never learned to read or write so well

He can play a guitar like he's ringing a bell

Go, go!

Go, Johnny, go, go!
Go, Johnny, go, go, go!

The twins were both rocking out on their guitars while the patrons danced like there was no tomorrow. Even people were paying more attention to George, even asking him to be class president. Marvin Berry was so impressed with Marty and Ally's guitar playing skills at this song that he rushed over to the phone that was off stage.

"Chuck! Chuck! It's Marvin! Your cousin Marvin Berry! You know that new sound that you were looking for?! Listen to this!" he exclaimed. He held up the phone so his cousin could hear what the twins were playing. The twins were still jamming out on their guitars, both hopping on one foot.

They were so into their performance that they had no idea that the guests had stopped dancing and they were watching the twins dance with their guitars. They were both doing dance moves from famous guitarists that these people hadn't heard of. From the Chuck Berry Duck Walk, and Jimi Hendrix's over the head guitar playing trick.

After Marty kicked a speaker over, it caused the frequency to go awry. Then, they both slide on their knees with their eyes shut, holding a single high pitched note. Ally opened her eyes and saw the crowd looking at them like they were crazy, instantly making her feel awkward. Without looking away, she patted Marty on the shoulder.

Marty opened his eyes and saw what Ally was talking about. Awkwardly, they stood back up and they took off their guitars, giving them back to their owners. "Looks like you guys aren't ready for that yet," Marty told them, fixing his suit. "But trust us when we say that your kids are going to love it," Ally added, giving them a confident look.

Afterwards, the twins went backstage while everyone else clapped. It got quieter when they left. They went down a flight of stairs, seeing Lorraine leaning against the doorway at the bottom of the stairs. "Lorraine," Marty said while smiling a bit. Ally stood next to him, also smiling. George was standing behind her with his jacket draped on his shoulder.

"Marty, Ally, that was very interesting music," she told them. "We did okay," Marty said with a modest smile. "Are you kidding? We did great. We got a chance to show them what we had," Ally added with a smile, nudging her brother. Marty couldn't help but grin because he knew that that was very true.

"If you guys don't mind, but George offered to take me home," Lorraine said, making George blush a bit. This made them perk up in excitement. "Oh, no, that's great!" Marty said, proud of their dad for becoming a more confident guy. They were happy to help him gain more credence with himself.

"You two are gonna be great together. I got a good feeling about you two," Ally said, unable to stop smiling. "Yeah, I got a good feeling too," Lorraine said, looking back at George, who smiled adorably at her. Lorraine smiled back at him with the same smile.

"Look, Marty and I hate to run, but we have something we gotta take care of," Ally said, putting a hand on Marty's back. "Yeah, it's been.. Educational," he told them with an awkward finger gesture. "Will we see you two again?" Lorraine asked them, not realizing that they were gonna be born in 13 years.

"We guarantee it," Marty replied, smiling at his parents. George then stepped up to talk to them. "Marty, Ally, I'd like to thank you two for giving me all of that good advice, I won't forget it," he told them, shaking their hands as a way of thanking them. "You're welcome. We can see that you came a long way," Marty said with a smile.

Marty and Ally turned around towards the backdoor but stopped because Marty had remembered something. "Oh, one last thing. If you two ever have kids, and when one of them accidentally sets the living room rug at 8 years old, go easy on him," Marty told them, making them blush. "And if the twin of that kid accidentally breaks a window with a baseball, don't be too hard on her," Ally added.

And with that, they left the building to go back to the town square. Lorraine couldn't help but smile after they left. "Hmm. Marty and Ally. Such nice names," she said with that same smile. Everything was going to be okay now.