Disclaimer: I do not own Back to the Future.

Author's Note: This story take place between Twins In Time (formerly Marty's Twin) and Kidnapped. Other then a brief trip to 1965, time travel is not the main premise of this story - but Marty learns to cope with having two sets of memories.

October 27, 1985
5:30 PM PST

"Hey, Marty, are you feeling okay?" Lorraine McFly asked his son, with concern - as the two of them were clearing the dirty dishes from the table.

"Yeah, Mom," replied Marty, "I'm fine, why"

"Well, it's just you're so quiet tonight," Lorraine replied. "I mean, you're not your usual talkative self."

"I just have a lot on my mind," explained Marty. "That's all."

"Well, is there anything you'd like to talk about?" Lorraine asked, gently. "You know that Dad and I are always there for you."

"Yeah, Mom, I understand," insisted Marty. "I'm not depressed or anything. I just have a lot on my mind, that's all."

Lorraine went to place her arms around her son. Marty hugged back, tightly - as he wept a little.

"Are you sure you're fine, honey?" Lorraine asked, softly. "It helps to talk about what's on your mind."

"Maybe later, Mom," Marty said, quietly - as he wiped his eyes with the back of his hand. "I just need to be alone for a little while, that's all."

"Okay, honey," replied Lorraine. "Just don't be afraid to talk with us, okay? Dad and I really do care a lot about you."

"Yes, Mom," replied Marty, as he went to his bedroom.

After Marty sat on his bed, he began to reflect on all the changes that his time travel experiences have caused. For starters, his parents were a lot more affectionate and loving - and they also had a lot more confidence in themselves. Also, Biff Tannen no longer bullied Marty's father, George. Biff Tannen now ran an auto dealing business, and he was very polite and respectful to the McFlys.

All that was a result of George punching out Biff, back in 1955 - when Biff had tried to rape Lorraine. All of that was because Marty came back in time, and he had encouraged George to stand up for himself. Of course, Marty had to make his parents fall in love - as to not get erased from existence. Through all that, however, Marty had come to see his parents in a different light - and had a great new respect for them.

The biggest, and perhaps the most important, change was the fact that Marty now had an identical twin brother - named Calvin, no less. On June 20 of 1968, a pair of identical twins named Calvin William McFly and Martin Seamus McFly were born to George and Lorraine McFly. Calvin was the older twin, by two minutes. Calvin and Marty have always been the best of friends.

While Marty now had two sets of memories, from both timelines - the set of memories from the timeline before Marty travelled back to 1955 still felt more real to him. Marty hoped that, as time passed, his other set of memories would start to feel more real to him. Although, truth to be told, Marty really didn't want to lose his memories from the old timeline. Despite all of the drawbacks, Marty wished to retain his memories of his old life - BTT, Before Time Travel, as Marty referred to it.

Despite the wrestling with his memories, though, Marty decidedly did feel a close bond to his twin. Since returning from 1955, Marty had been pondering over all the memorable moments thst he had with Calvin - ATT, After Time Travel. He remembered how Calvin had been jealous, when Marty first started dating Jennifer Parker. It wasn't that Calvin had a crush on Jennifer, too - but Calvin felt like he was being replaced in his twin's life, with a girl. After all, Marty had a girlfriend - and Calvin didn't. Calvin had even resorted to some rather immature tactics, in an effort to break up Marty and Jennifer - which he has since regretted. Fortunately, Calvin had soon come to accept the presence of a girl in his twin's life - and Calvin had even set up a candlelight dinner for Marty and Jennifer, as sort of a peace offering. Other than the one event, though, Marty and Calvin very rarely fought.

Marty and Calvin were two of the most popular, as well as the nicest, kids in school. However, Marty tended to be the more impulsive of the two - while Calvin was always the sensible one who rarely made rash decisions. Also, Calvin was the more studious of the two - and he actually enjoyed school. Marty, on the other hand, was habitually late for classes - and he didn't get as good grades at school. Mr. Strickland always referred to Marty as being a "slacker" - and he was always comparing Marty unfavourably to his twin. In fact, the one time that Calvin had been late to school, Mr. Strickland had insisted that he was really Marty pretending to be his twin - because, after all, Calvin was never late for school. As a result, Marty sometimes felt real insecure - and felt as though he was regarded as being the "bad twin". Still, Marty loved his twin with all of his heart - and it was hard for him to resent Calvin too much.

Marty had spent a few hours reading through old diaries, and making notes of all the differences between the two timelines. Marty was more impressed by how much had stayed the same, than by how much was different. Marty still met Doc Brown the same way, when he was being bullied by Cliff Tannen and his gang. Marty also managed to set the living room rug on fire at the age of eight - just as predicted to his parents back in 1955. He obviously made a big impression on his parents in 1955, if his twin ended up being named Calvin. There was the question, though, of if Marty's parents would ever find out who the mysterious "Calvin Klein" really was.

"Hey, Marty," Calvin called out, softly. "Can I come in?"

"Sure," replied Marty. "I was just doing some reflecting."

"You mean on your old life," asked Calvin, "where I didn't even exist?"

"Actually," Marty replied, slowly, "I was doing more reflecting on this life. My memories really are coming back to me. You and I have had lots of memorable moments together."

"That's good," Calvin said, quietly. "At first, I was worried that I lost you forever. I mean, you didn't even remember me when - you first came back from 1955."

"I think it just took a little while for the ripple effect to catch up," Marty suggested.