Dr. Venture (voice)

Dean Venture (voice)

Dr. Girlfriend / Henchman 21 (voice)

Hank Venture / The Monarch (voice)

Brock Samson (voice)

31 eps

Dr. Orpheus (voice) / Vincenzo (voice) / Dr. Byron Orpheus / Vincenzo (voice) / Haranguetan (voice)

24 eps

Dr. Jonas Venture (voice) / Jonas Venture Sr. (voice) / Dr. Jonas Venture / Additional Voices (voice) / Jonas Venture Sr. / Psychiatrist (voice) / Jonas Venture Sr. / Security Guard 2 (voice) / Sandow (voice) / Fighter Pilot / O.S.I. Instructor (voice) / Jonas Venture Sr. / Additional Voices (voice) / Priest 1 / Jonas Venture (voice) / Dr. Jonas Venture / OCLF Leader (voice) / Highway Cop / Scared Straight Kid 1 (voice) / Sonnystein / Gill-Man (voice) / Jonas Venture Sr. / University President / Homeless Vet (voice) / Dr. Jonas Venture / More Pirates (voice) / Jonas Venture Sr. / Laugh Riot (voice) / Jonas Venture Sr. / Sandow / Samuel Clemens (voice) / Sonny / Interpreter / Little Jorgé (voice) / Tigerriffic / Therapist / Prison Guard 2 (voice)

16 eps

Triana Orpheus (voice) / Jeanie / Leslie Cohen / Lesliebots (voice) / Jeanie (Mrs. Tom) (voice) / Princess Tinglepants (voice)