Night of the Lepus
From The Big Bang Theory Wiki
As a follow-up to their discussion about the feasibility of giant ants after watching the movie Them!, Raj, Sheldon, and Howard discuss the possibility of giant rabbits while browsing in the comic book store. According to Bill Prady on his Twitter feed, they are referring to the film Night of the Lepus, a 1972 film in which giant rabbits terrorize a small town (0319).
