The Prestidigitation Approximation
| Episode Number | 18 |
|---|---|
| Season | 4 |
| Aired | 2011-03-10 |
| Overview | Sheldon is baffled by Wolowitz's magic trick. Meanwhile, Leonard realizes dating Priya may make it impossible to continue being friends with Penny. |
| Runtime | 25 minutes |
| Absolute Number | 81 |
| Finale Type |