S2E23
The Monopolar Expedition
The Big Bang Theory
calendar_todayMay 11, 2009
schedule21 min
star7.4
The guys' plan to work over the summer at the North Pole makes Penny revaluate her feelings for Leonard.
broadcast_on_home Networks
CBS
star Guest Stars
Alice Amter
Mrs. Koothrappali
Brian George
V.M. Koothrappali
Carol Ann Susi
Debbie Wolowitz (voice)