The Expedition Approximation
| Episode Number | 6 |
|---|---|
| Season | 8 |
| Aired | 2014-10-20 |
| Overview | 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. Leonard and Penny seek advice from Howard and Bernadette after they fight about money. |
| Runtime | 25 minutes |
| Absolute Number | 165 |
| Finale Type |