- Yvonne Orji - Tess (voice)
- Chelsea Peretti - Pam (voice)
- Kari Wahlgren - Original KRS / Lootbat (voice)
- Kari Wahlgren - Lootbat / EHC Guard 3 / PA System (voice)
- Kari Wahlgren - Mrs. Peeps / Ashley / Bounty Hunter Alien / Announcer (voice)
- Kari Wahlgren - Lootbat (voice)
- Patrick Harpin - Blobby (voice)
- Patrick Harpin - Additional Voices (voice)
- Patrick Harpin - Kryll (voice)
- Patrick Harpin - Pulgan Chicken Vender / Pulgan Shop Owner (voice)
- Patrick Harpin - Kryll / Cock-a-Roos (voice)
- Patrick Harpin - Blobby / Janitor / Player #1 (voice)
- Devin Bright - Player #2 (voice)
- Leslie Uggams - Grandma (voice)
- Angela Malhotra - Alien in Commercial (voice)
- Max Mittelman - Angry Boarfish / Dalthar (voice)
- Donna Rae Allen - Additional Voices (voice)
- Jenna Elfman - Setelva (voice)
- Keith Ferguson - EHC Guard #3 / EHC Guard #5 (voice)
- Keith Ferguson - Mr. Ivey / Alex / Student / Angry Boarfish Alien (voice)
- Keith Ferguson - Booth Attendant / Boarfish Dad / EHC Guard #3 (voice)
- Keith Ferguson - Pulgan Bus Driver / Pulgan Bystander (voice)
- Keith Ferguson - EHC Guard #1 / EHC Guard #4 (voice)
- Kevin Durand - Chakalau (voice)
- Kevin Durand - Chakalau / EHC Supervisor (voice)
- Lauren Tom - MCKoren / Chillion Supervisor (voice)
- Katie Shaughnessy - Additional Voices (voice)
- Katie Shaughnessy - Giblin Kids / Chillas / Chilla Mascot (voice)
- Katie Shaughnessy - EHC Guard #2 (voice)
- Dino Andrade - Karl / Busted Bot (voice)
- Dino Andrade - Pulgan Fish Vendor Alien / Pulgan Monk (voice)
- Dino Andrade - Batlang Prisoner / Blob Prisoner (voice)
- Greg Chun - Additional Voices (voice)
- Greg Chun - EHC Guard 4 (voice)
- Greg Chun - EHC Squad Leader (voice)
- Ralph Ineson - The Widowmaker (voice)
- Andrew Morgado - Additional Voices (voice)
- Andrew Morgado - EHC Guard 5 (voice)
- Andrew Morgado - EHC Clerk / EHC Guard #2 (voice)
- Christian Lanz - Additional Voices (voice)
- Christian Lanz - Alien Bounty Hunter / EHC Guard 1 / Alien Investor (voice)
- Christian Lanz - EHC Guard #2 / EHC Guard #5 (voice)
- Christian Lanz - EHC Captain / EHC Guard 1 / EHC Guard 3 (voice)
- Tim Meadows - Principal Lieb (voice)
- Caleb Yen - Brian / Bucky's Supervisor Bot (voice)
- Secunda Wood - Additional Voices (voice)
- Secunda Wood - Doloraami Drummer (voice)
- Secunda Wood - Pulgan Walla (voice)
- Arnie Pantoja - Zeitler (voice)
- Adewale Akinnuoye-Agbaje - Emperor Odomon (voice)
- Amir Talai - EHC Booking Officer (voice)
- Amir Talai - Boarfish Boy / Robot Dealer / Snooty Cashier (voice)
- Candi Milo - Giblin Mobster Mother / Alien Girl (voice)
- Venice Wong - Halvey (voice)
- Keith David - B'Caala (voice)
- SungWon Cho - EHC Pilot 1 & 2 / EHC Workers (voice)
- SungWon Cho - EHC Soldier 1 (voice)
- SungWon Cho - EHC Guard #3 / EHC Guard #6 / EHC Guard #7 (voice)
- SungWon Cho - Casino Bouncer / Casino Cashier / Giblin Mobster (voice)
- Godfrey - Ja Boluu / Doloraami Guard 1 / Vunaari Prisoner (voice)
- Janet Hubert - Empress Gurira (voice)
- Cedric L. Williams - Mox / Attendant (voice)
- Cedric L. Williams - Mox (voice)
- Geno Segers - Alien Bouncer / Fratty Alien Bro (voice)
- Thando Thabethe - Adja (voice)
- Kevin Michael Richardson - Clean Mike / Hil'Gord Robot (voice)
- Kevin Michael Richardson - Dirty Mike / Clean Mike / Sphinx (voice)
- Gina Yashere - Doloraami Prosecutor (voice)
- Gina Yashere - Doloraami Prosecutor / Doloraami Warrior 1 (voice)
- Jordan Mosley - Additional Voices (voice)
- Hakeem Kae-Kazim - Doloraami Warriors (voice)
- Maurizio Armato
Hakeem Kae-Kazim interpreta a Doloraami Warriors (voice) en la serie.
Laz Alonso interpreta a Terry / Sabo Brok (voice) en la serie.
Priah Ferguson interpreta a Lisa (voice) en la serie.
JeCobi Swain interpreta a Sean (voice) en la serie.
Yvette Nicole Brown interpreta a KRS (voice) en la serie.
Yvonne Orji interpreta a Tess (voice) en la serie.
Chelsea Peretti hace el papel de Pam (voice).
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