- Chris Pratt - Cooper (voice)
- Powers Boothe - Sunder (voice)
- Peter Stormare - King Xarion / King Viktor (voice)
- Beth Littleford - Sandra Tennyson (voice)
- Greg Ellis - Dagonet / Reporter Chet Rigby (voice)
- Greg Ellis - Prince Gyula / Cyborg #2 (voice)
- J.K. Simmons - Magister Gilhil / Plumber (voice)
- Scott Menville - Jimmy Jones (voice)
- Scott Menville - Jimmy / J.T. / Pilot 2 (voice)
- Scott Menville - J.T. (voice)
- Fred Tatasciore - Staradisimus / Forever Knight #3 (voice)
- Fred Tatasciore - Foreman / Surgeon / Hammer (voice)
- Fred Tatasciore - Quince / Robot Guard (voice)
- Nicholas Guest - Simons / Worker / Guest (voice)
- Peter MacNicol - Oliver / Forever Knight #1 (voice)
- Matt Levin - Cash (voice)
- Tara Strong - Serena / Young Ben Tennyson (voice)
- Kevin Michael Richardson - Magister Pyke (voice)
- Kevin Michael Richardson - Kwarrel (voice)
- Xander Berkeley - Warden Morgg / Trukk (voice)
- Brian George - Victor Valadis / Janitor (voice)
- Miguel Ferrer - Magister Hulka / Alpha #4 (voice)
- Rob Paulsen - Baz-El / Forever Knight #1 / Churl #4 (voice)
- Rob Paulsen - Technician / Rhomboid Vreedle / Engineer #2 (voice)
- Rob Paulsen - Rhomboid Vreedle / Magister Patelliday (voice)
- Charlie Schlatter - Tack / Plumber (voice)
- Olivia Hack - Emily (voice)
- Jason Marsden - Antonio (voice)
- Jason Marsden - Young Max Tennyson (voice)
- Paul Eiding - Max Tennyson / Guard #1 / Guard #2 (voice)
- David McCallum - Professor Paradox (voice)
- Juliet Landau - Natalie Tennyson / Melinda (voice)
- Juliet Landau - Verdona Tennyson / Waitress (voice)
- Juliet Landau - Fritz (voice)
- James Arnold Taylor - Announcer / Fake Vilgax / Fridge (voice)
- James Arnold Taylor - Plumber Officer / Brannigan / Kolar (voice)
- Adam Wylie - Pierce / Forever Knight #3 (voice)
- Molly C. Quinn - Eunice / Computer (voice)
- Diedrich Bader - Simian (voice)
- Jon Polito - Mizaru (voice)
- Dwight Schultz - Dr. Animo / Teacher #2 (voice)
- Dwight Schultz - Sheriff / Dr. Animo (voice)
- Alexander Polinsky - Argit (voice)
- Tia Texada - Elena Validus (voice)
- Keone Young - Julie's Dad / Repair Man / Cop (voice)
- Yeni Alvarez - Dr. Borges (voice)
- Bill Mumy - Agent Bryson (voice)
- Vicki Lewis - Agent Locke (voice)
- Peter Renaday - Sir George (voice)
- Peter Renaday - Old George (voice)
- Diane Delano - Ma Vreedle / Pretty Boy Vreedle (voice)
- Jeff Bennett - Magister Labrid / Major General (voice)
- Jeff Bennett - Major Domo / Hugh (voice)
- Jeff Bennett - Pops Vreedle / Jailer (voice)
- Robin Atkin Downes - Sir Cyrus / Additional Voices (voice)
- Richard Doyle - Driscoll / Additional Voices (voice)
- Khary Payton - Hex (voice)
- Kari Wahlgren - Charmcaster (voice)
- Christopher McDonald - Captain Nemesis (voice)
- Wil Wheaton - Mike Morningstar / Darkstar (voice)
- Marianne Muellerleile - Maureen (voice)
- Tara Platt - Jennifer Nocturne (voice)
- Danny Jacobs - Captain / Police Dispatch / Dr. Pervis (voice)
- Patrick Cavanaugh - Winston / Esoterica / Additional Voices (voice)
- James Remar - Vilgax (voice)
- Jim Piddock - King Urien / Color Commentator / Chair Umpire (voice)
- John DiMaggio - Aggregor (voice)
- John DiMaggio - Vulkanus / Rath (voice)
- John DiMaggio - Diagon (voice)
- John DiMaggio - Will Harangue / Octagon Vreedle (voice)
- John DiMaggio - Rath / Conduit Edwards / Diagon (voice)
- John DiMaggio - Swamps / Rath Albedo / V.O. Announcer (voice)
- John DiMaggio - Trash Monster / Colonel Rozum / Additional Voices (voice)
- John DiMaggio - Spellbinder / Addwaitya / Diagon (voice)
- John DiMaggio - Young Four Arms / Aggregor (voice)
- John DiMaggio - Foreverduke838 (voice)
- John DiMaggio - Forever Knight #2 / Rath / TV Reporter (voice)
- John DiMaggio - Conduit Edwards / Carnival Barker (voice)
- John DiMaggio - Plumber / Aggregor (voice)
- John DiMaggio - Audience Member / Will Harangue / Rath (voice)
- John DiMaggio - Addwaitya / Aggregor / Faint Voice (voice)
- John DiMaggio - Magister Coronach / Octagon Vreedle (voice)
- John DiMaggio - Will Harangue / Rath (voice)
- John DiMaggio - Ultimate Aggregor / Volann Commander (voice)
- Zeno Robinson - Alan Albright / Heatblast (voice)
- Tress MacNeille - Zennith (voice)
- Sean Donnellan - Ben 10,000 / Eon (voice)
- Sean Donnellan - Cameraman / Thug / Tech (voice)
- Dan Riba
- Butch Lukic
- Matt Youngberg
- Brian Swenlin
- Ernie Altbacker
- J. M. DeMatteis
- Peter David
- Len Wein
- Adam Beechen
Marianne Muellerleile hace el papel de Maureen (voice).
Peter Stormare hace el papel de King Xarion / King Viktor (voice).
Christopher McDonald interpreta a Captain Nemesis (voice) en la serie.
Xander Berkeley interpreta a Warden Morgg / Trukk (voice) en la serie.
Jon Polito interpreta a Mizaru (voice) en la serie.
Greg Ellis interpreta a Dagonet / Reporter Chet Rigby (voice) en la serie.
James Remar interpreta a Vilgax (voice) en la serie.
Wil Wheaton interpreta a Mike Morningstar / Darkstar (voice) en la serie.
Yuri Lowenthal hace el papel de Ben Tennyson (voice).
Ashley Johnson interpreta a Gwen Tennyson (voice) en la serie.
Capítulo disponible en las siguientes plataformas:
