The Dumpling Paradox
S01E07 - Airdate: 2007-11-05
Runtime: 30 min
When Wolowitz seduces Penny's friend and takes over her apartment, Penny sleeps on Leonard and Sheldon's couch. With Wolowitz preoccupied, the guys discover they are without a fourth member of their group and in desperation, they ask Penny to join their Halo team.
Episode details and rating from TVmaze.