Aliens

Any extraterrestrial life forms that appear in the series real or imagined. 
* Jeff Jingle as Alien #1
* Mark Maitre as Alien #2
* Michael Shawn McCracken as Gorn in" The Apology Insufficiency" who haunts Sheldon in his dreams.
Category:Aliens
Category:The Big Bang Theory Cast
Category:One-episode appearance (The Big Bang Theory)