The Big Bang Theory - Season 2 Link

: Sheldon is overwhelmed by a Christmas gift from Penny—a napkin signed by Leonard Nimoy. It is often cited as one of the series' best moments.

: This season introduced fan favorites Stuart Bloom (Kevin Sussman), the comic book store owner, and Dr. Barry Kripke (John Ross Bowie), Sheldon’s university rival. Major Story Arcs & Plot Points The Big Bang Theory - Season 2

(Jim Parsons): His social idiosyncrasies and obsessive behaviors become more central to the show's comedy. : Sheldon is overwhelmed by a Christmas gift