The Imitation Perturbation
| Episode Number | 6 |
|---|---|
| Season | 12 |
| Aired | 2018-10-25 |
| Overview | When Wolowitz dresses up as Sheldon for Halloween, Sheldon seeks retaliation at Leonard and Penny’s Halloween party. Also, Leonard is shocked that Penny doesn’t remember their first kiss. |
| Runtime | 25 minutes |
| Absolute Number | 261 |
| Finale Type |