The Expedition Approximation

EPISODE:

Episode Info

Sheldon and Raj undertake an underground research expedition that turns into a test of how long before they get under each other's skin. Meanwhile, Leonard and Penny argue about money, and go to Wolowitz and Bernadette for advice.

Cast

Kaley Cuoco
as Penny
Johnny Galecki
as Leonard
Jim Parsons
as Sheldon
Simon Helberg
as Howard Wolowitz
Kunal Nayyar
as Rajesh Koothrappali
Melissa Rauch
as Bernadette Rostenkowski
Mayim Bialik
as Amy Farrah Fowler
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The Expedition Approximation Photos