Teenage Mutant Ninja Turtles Good Genes: Part 1 (2003–2010) Online
Leo, Mikey, Raph, Splinter, and Leatherhead are desperate in curing Donny. Their only choice is to make a deal with the devil (Bishop himself).
| Episode credited cast: | |||
 | Michael Sinterniklaas | - | Leonardo (voice) (as Mike Sinterniklaas) |
 | Wayne Grayson | - | Michelangelo (voice) |
 | Gregory Abbey | - | Raphael (voice) (as John Campbell) |
 | Darren Dunstan | - | Splinter (voice) |
 | Veronica Taylor | - | April O'Neil (voice) |
| Marc Thompson | - | Casey Jones (voice) |
| Scott Williams | - | Baxter Stockman (voice) |
| Rest of cast listed alphabetically: | |||
| Greg Carey | - | Leatherhead (voice) (as Gary K. Lewis) |
 | Brian Maillard | - | Air Mystic / Water Mystic (voice) |
| David Zen Mansley | - | Agent Bishop (voice) |
| Karen Neil | - | Karai / The Shredder (voice) |
 | Sean Schemmel | - | Earth Mystic / Fite Mystic / Metal Mystic (voice) |