Penny sleeps on Leonard and Sheldon's couch when Wolowitz seduces her friend and takes over her apartment; in need of a fourth member, the guys ask Penny to join their "Halo" team.
Director:
Mark Cendrowski
Cast:
Johnny Galecki
Jim Parsons
Simon Helberg
Kunal Nayyar
Kaley Cuoco
Brooke D'Orsay
James Hong