 | Yu Asakawa | ... | Priss Asagiri (unknown episodes) |
| Satsuki Yukino | ... | Sylia Stingray (unknown episodes) |
| Rio Natsuki | ... | Linna Yamazaki (unknown episodes) |
| Hiroko Konishi | ... | Nene Romanova (unknown episodes) |
| Kiyoyuki Yanada | ... | Leon McNichol (unknown episodes) |
| Yûji Ueda | ... | Daly Wong (unknown episodes) |
| Jôji Nakata | ... | Brian J. Mason (unknown episodes) |
| Yui Horie | ... | Galatea (unknown episodes) |
| Christine M. Auten | ... | Priss S. Asagiri (English Dub) (unknown episodes) |
| James Bates | ... | Additional Voices (unknown episodes) |
| Kelly Jean Beard | ... | Additional Voices (unknown episodes) |
| Heather Bryson | ... | Sylia's Mother (unknown episodes) |
| Victor Carsrud | ... | Refugees Leader, Refugee, Additional Voices (unknown episodes) |
| Laura Chapman | ... | Sylia Stingray (unknown episodes) |
| Kelli Cousins | ... | TV Spokesgirl (unknown episodes) |
| Melinda DeKay | ... | Linna's Mother (unknown episodes) |
| Jason Douglas | ... | Leon (unknown episodes) |
| Randy Fox | ... | Boomer, Sewer Crew 5, Additional Voices (unknown episodes) |
| Hiroko Fukumori | ... | Additional Voices (unknown episodes) |
| Laura Gadbois | ... | Additional Voices (unknown episodes) |
| Foley Gang | ... | Refugees, Additional Voices (unknown episodes) |
| Dell Gibson | ... | Boomers, Dharma, Additional Voices (unknown episodes) |
| Tiffany Grant | ... | Manager 352 (unknown episodes) |
| Matt Greenfield | ... | Additional Voices (unknown episodes) |
| John Gremillion | ... | Nigel (unknown episodes) |
| Hilary Haag | ... | Nene Romanova (unknown episodes) |
| Jay Hickman | ... | Boomer (unknown episodes) |
| Kevin Hinnant | ... | Additional Voices (unknown episodes) |
| Junie Hoang | ... | Additional Voices (unknown episodes) |
| John Kaiser | ... | Linna's Father, Refugee, Additional Voices (unknown episodes) |
| Mike Kleinhenz | ... | Doctor (unknown episodes) |
| Andrew Klimko | ... | Obnoxious Customer (unknown episodes) |
| Larry Koteff | ... | Additional Voices (unknown episodes) |
| Jason Lee | ... | Daniel, Sewer Crew 4 (unknown episodes) |
| David LeMaster | ... | Sewer Crew 3, Additional Voices (unknown episodes) |
| Kelly Manison | ... | Linna Yamazaki (unknown episodes) |
| Carol Matthews | ... | Voice Of GENOM, Secretary Boomer, Computer, Narration, Additional Voices (unknown episodes) |
| Andy McAvin | ... | Brian J. Mason (unknown episodes) |
| John Miller | ... | Additional Voices (unknown episodes) |
| Linda Miller | ... | Additional Voices (unknown episodes) |
| Rob Mungle | ... | Nick (unknown episodes) |
| Chris Patton | ... | Daley Wong (unknown episodes) |
| Rick Peeples | ... | Additional Voices (unknown episodes) |
| Rod Peters | ... | Refugee, Additional Voices (unknown episodes) |
| Ted Pfister | ... | Haruma, Additional Voices (unknown episodes) |
| Phil Ross | ... | Henderson The Butler (unknown episodes) |
| William Ross | ... | Interviewer, Sewer Crew 1 (unknown episodes) |
| Diane Salter | ... | Customer, Hungry Customer, Ellen, Additional Voices (unknown episodes) |
| Lisa Sedgewick | ... | Additional Voices (unknown episodes) |
| Marc Shreiner | ... | Masaki, Additional Voices (unknown episodes) |
| Paul Sidello | ... | Yano, Additional Voices (unknown episodes) |
| Sheri Sims | ... | Elias Drake, Additional Voices (unknown episodes) |
| Doug Smith | ... | Fox (unknown episodes) |
| Melissa Cybele Sparks | ... | Misae (unknown episodes) |
| Randy Sparks | ... | Commander Sparks, Additional Voices (unknown episodes) |
| Spike Spencer | ... | Mackie (unknown episodes) |
| Hunter Stuart | ... | Dr. Shan, Additional Voices (unknown episodes) |
| John Swasey | ... | Quincy Rosenkreutz (unknown episodes) |
| Shawn Taylor | ... | Narration, Additional Voices (unknown episodes) |
| Lew Temple | ... | Maxon (unknown episodes) |
| Robert Vellani | ... | Kurata, Additional Voices (unknown episodes) |
| Kira Vincent-Davis | ... | Young Sylia, Young Galatea (unknown episodes) |
| Brett Weaver | ... | Kain Smith (unknown episodes) |
| Ted Westby | ... | Bill, Sewer Crew 2 (unknown episodes) |
| Matt Wethington | ... | Chief Miles, Additional Voices (unknown episodes) |
| Kevin Winkler | ... | Refugee (unknown episodes) |
| Kimberly Yates | ... | Maria, Additional Voices (unknown episodes) |
company.