The Explosion Implosion
| Episode Number | 4 |
|---|---|
| Season | 11 |
| Aired | 2017-10-16 |
| Overview | Wolowitz and Sheldon bond when they drive to the desert to shoot off a model rocket. Also, when Leonard's mom, Beverly, finds a new best friend in Penny, it rubs Leonard the wrong way. |
| Runtime | 25 minutes |
| Absolute Number | 235 |
| Finale Type |