| Name | Character | Episodes |
|---|---|---|
| Joanna Daniels | Mom (voice) | 28 |
| Andy Merrill | Brak (voice) | 28 |
| Carey Means | Thundercleese (voice) | 28 |
| George Lowe | Dad (voice) | 28 |
| C. Martin Croker | Zorak (voice) | 28 |
| Lewis Black | 2 | |
| George Takei | 1 | |
| 'Weird Al' Yankovic | Petroleum Joe (voice) | 1 |
| Cee Lo Green | Prime Cut (voice) | 1 |
| C. Martin Croker | 0 |