Stuart Bloom was introduced in The Big Bang Theory Season 2 episode “The Hofstadter Isotope” as the owner of the comic book ...
Sussman’s Stuart appeared in most episodes of the original series as he arrived in Season 2 of The Big Bang Theory and returned for dozens of episodes throughout the rest of the show’s run.
The next Big Bang Theory spinoff has an official title, and Kevin Sussman's Stuart Bloom will be the show's main focus.