8
/10
Sebastian is a fictional character portrayed by Steven Yeun in the TV series The Big Bang Theory.
In the first episode they appeared in, titled The Staircase Implementation (season 3), they were 26 years old.
They appear in 1 episodes out of a total of 279 aired

Sebastian

by Steven Yeun

character

Episodes1

  • 9
    /10

    The Staircase Implementation
    episode S3.E22 may 2010
    Leonard tells Penny about how he and Sheldon became roommates and what happened to the elevator.