The Infestation Hypothesis
| Episode Number | 2 |
|---|---|
| Season | 5 |
| Aired | 2011-09-22 |
| Overview | A fight between Sheldon and Penny leaves Amy caught in the middle. Meanwhile, Leonard tries to spice up his long-distance relationship with Priya. |
| Runtime | 25 minutes |
| Absolute Number | 89 |
| Finale Type |