The Big Bang Theory
The Monopolar Expedition (05/11/2009)
Overview
The guys' plan to work over the summer at the North Pole makes Penny revaluate her feelings for Leonard.
Main Cast
Johnny Galecki
Leonard Hofstadter
Jim Parsons
Sheldon Cooper
Kaley Cuoco
Penny
Simon Helberg
Howard Wolowitz
Kunal Nayyar
Rajesh Koothrappali