More from TVLine “When I got accepted to grad school at Caltech, I was afraid to move so far away from home, so Tam said he'd move out here with me and be my roommate,” Sheldon explained to Amy. “Then over the summer, he got a girlfriend… even after reading all the pamphlets I gave him about social diseases.
Roommate agreement with apartment flag logo. The Roommate Agreement was written by Sheldon and was signed by Leonard when they first became roommates. These events were shown during a flashback in "The Staircase Implementation".
Penny was the same age as Kaley was at the start of the show - 21 - while both Leonard and Sheldon are between 5/6 years older than Penny though their real life counterparts Johnny and Jim are both 10 years older than Kaley.
Sheldon never met Leonard, Howard, and Raj until they were all around 24. Penny didn't move into the building until Sheldon and Leonard were both 27 and have been living there as roommates and best friends for three years; Penny was only 21 then.
It dictates what Leonard has to eat each day of the week, what TV shows he is allowed to watch, whether he has a girlfriend stay over, that he has to drive Sheldon everywhere he wishes to go, whenever he wishes. It even dictates when Leonard is allowed to use the bathroom.
Sheldon never met Leonard, Howard, and Raj until they were all around 24. Penny didn't move into the building until Sheldon and Leonard were both 27 and have been living there as roommates and best friends for three years; Penny was only 21 then.
Fans of the hit sitcom will know that Sheldon (Jim Parsons) had a first roommate, Sebastian (Oscar nominee Steven Yeun), prior to Leonard (Johnny Galecki) moving in.
The Staircase Implementation - The Big Theory (Season 3, Episode 22) - Apple TV.
A flashback in the season three episode “The Staircase Implementation” reveals that the two characters met when Leonard applied to be Sheldon's roommate. That moment, we are told, was “seven years ago”, and the episode aired in 2010, meaning that Sheldon and Leonard presumably met in 2003.
Frank and Alicia are some friends of Sheldon, who are only mentioned in "The Fermentation Bifurcation". Sheldon mentions them as alternatives to his regular friends whom he figuratively likes to keep under his sink and have to maintain a little mystery with his regular friends.