8x06 The Expedition Approximation
First Aired: Oct. 20, 2014 on CBS
Summary: Sheldon and Raj see if they can survive a research expedition in a salt mine. Leonard and Penny fight about money and go to Wolowitz and Bernadette for advice.
Watch Episode On:- Amazon (purchase)
- VUDU (purchase)
- Verizon On Demand (purchase)
- HBO MAX (subscription)
Guest Stars[no credits found]