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 deep underground. Meanwhile, Leonard and Penny seek advice from Howard and Bernadette after they fight about money.
| Title | The Expedition Approximation |
|---|---|
| Genres | Comedy |
| Release Date | 2014-10-20 |
| Episode Runtime | 00 Hours 22 Minutes |
| Season Number | 8 |
| Episode Number | 6 |
| Production Companies | Chuck Lorre Productions, Warner Bros. Television |
