| Name | Character | Episodes |
|---|---|---|
| Melanie Lynskey | Megan | 60 |
| Roger Craig Smith | Brad | 60 |
| Andy Milonakis | Danny | 60 |
| Laura Bailey | Trace | 60 |
| Laura Silverman | Maude | 60 |
| Jessica DiCicco | Bug | 60 |
| Corey Burton | Narrator | 60 |
| James Adomian | Future-Worm | 60 |
| Ryan Quincy | Doug | 60 |
| Justin Roiland | Mr. Clock Face (voice) | 6 |
| Justin Roiland | General Couponocus (voice) / Commandant Giflington (voice) | 3 |
| Justin Roiland | Professor Gigglesnorp (voice) | 3 |
| Justin Roiland | General Couponocus (voice) | 3 |
| Justin Roiland | Homework Android (voice) | 2 |
| Justin Roiland | Professor Gigglesnorp (voice) / General Couponocus (voice) | 1 |