Sheldon Cooper is a character from the CBS TV series The Big Bang Theory portrayed by Jim Parsons.
Cooper appears in "Business Guy" in an episode of The Big Bang Theory, with Parsons reprising his role.
Brian uses Sheldon's catchphrase of "bazinga!" in "Our Idiot Brian". Peter acknowledges that it came from the "gay scientist on TV."
In "The Return of the King (of Queens)", Peter objects to streaming because there are no non-network shows that feature Sheldon.