The Alien Parasite Hypothesis
- Episode aired Dec 9, 2010
- TV-PG
- 20m
Amy discovers some unusual feelings and urges when she meets Penny's ex-boyfriend, Zack. Meanwhile, Howard and Raj argue over who would be a superhero and who would be their sidekick.Amy discovers some unusual feelings and urges when she meets Penny's ex-boyfriend, Zack. Meanwhile, Howard and Raj argue over who would be a superhero and who would be their sidekick.Amy discovers some unusual feelings and urges when she meets Penny's ex-boyfriend, Zack. Meanwhile, Howard and Raj argue over who would be a superhero and who would be their sidekick.