Sheldon and Raj test whether they could survive a dark-matter research expedition in a salt mine by simulating the conditions in a steam tunnel. Meanwhile, Leonard and Penny seek advice from Howard and Bernadette when they argue about money.
Episode rating
Cast of episode
64
25
4
3
2
1
- Sheldon Cooper
- Raj Koothrappali
- Penny
- Bernadette Rostenkowski
- Leonard Hofstadter
- Howard Wolowitz
- Amy Farrah Fowler