The Big Bang Theory > Season 4 > Episode 10 The Alien Parasite Hypothesis - The Big Bang Theory Episodes Online

Phew, that was a close one,  Big Bang  theorists -- Sheldon Cooper held a girl's hand for all of three seconds, and he didn't recoil away. Oh yeah, also, for a second there, after Amy Farrah Fowler's sexual appetite unexpectedly spiked from more

After Howard has a close encounter with a rat, he and Raj argue about who would be the hero and who would be the sidekick in their hypothetical vermin-based superhero duo. Meanwhile, Amy tries to figure out just why she felt warm and tingly around Pen more