Yuri LowenthalBen Tennyson (voice) Ashley JohnsonGwen Tennyson (voice) Greg CipesKevin Levin (voice) Dee Bradley BakerHumungosaur (voice) John DiMaggioAggregor (voice) Jeff BennettAzmuth (voice) Vyvan PhamJulie Yamamoto / Computer Voice (voice) Paul EidingMax Tennyson / Guard #1 / Guard #2 (voice) Peter RenadaySir George (voice) Scott MenvilleJimmy Jones (voice) Juliet LandauNatalie Tennyson / Melinda (voice) James RemarVilgax (voice) Alexander PolinskyArgit (voice) Kari WahlgrenCharmcaster (voice) Fred TatascioreQuince / Robot Guard (voice) Rob PaulsenTechnician / Rhomboid Vreedle / Engineer #2 (voice) David McCallumProfessor Paradox (voice) Dwight SchultzDr. Animo / Teacher #2 (voice) Wil WheatonMike Morningstar / Darkstar (voice) Patrick CavanaughWinston / Esoterica / Additional Voices (voice) Chris PrattCooper (voice) Greg EllisDagonet / Reporter Chet Rigby (voice) Peter MacNicolOliver / Forever Knight #1 (voice) Kevin Michael RichardsonMagister Pyke (voice) Jason MarsdenAntonio (voice) James Arnold TaylorPlumber Officer / Brannigan / Kolar (voice) Molly C. QuinnEunice / Computer (voice) Tia TexadaElena Validus (voice) Robin Atkin DownesSir Cyrus / Additional Voices (voice) Richard DoyleDriscoll / Additional Voices (voice) Christopher McDonaldCaptain Nemesis (voice) Tara PlattJennifer Nocturne (voice) Zeno RobinsonAlan Albright / Heatblast (voice) Sean DonnellanCameraman / Thug / Tech (voice) Powers BootheSunder (voice) Peter StormareKing Xarion / King Viktor (voice) Beth LittlefordSandra Tennyson (voice) J.K. SimmonsMagister Gilhil / Plumber (voice) Nicholas GuestSimons / Worker / Guest (voice) Tara StrongSerena / Young Ben Tennyson (voice) Xander BerkeleyWarden Morgg / Trukk (voice) Brian GeorgeVictor Valadis / Janitor (voice) Miguel FerrerMagister Hulka / Alpha #4 (voice) Charlie SchlatterTack / Plumber (voice) Adam WyliePierce / Forever Knight #3 (voice) Diedrich BaderSimian (voice) Keone YoungJulie's Dad / Repair Man / Cop (voice) Yeni AlvarezDr. Borges (voice) Bill MumyAgent Bryson (voice) Vicki LewisAgent Locke (voice) Diane DelanoMa Vreedle / Pretty Boy Vreedle (voice) Marianne MuellerleileMaureen (voice) Danny JacobsCaptain / Police Dispatch / Dr. Pervis (voice) Jim PiddockKing Urien / Color Commentator / Chair Umpire (voice) Tress MacNeilleZennith (voice) 
