J.D. Roth (28)

Jonny Quest (voice)

Quinton Flynn (31)

Jonny Quest (voice)

Jesse Douglas

Jessie Bannon (voice)

Michael Benyaer (26)

Hadji Singh (voice)

Rob Paulsen (40)

Hadji Singh (voice)

George Segal (62)

Dr. Benton Quest (voice)

John de Lancie (48)

Dr. Benton Quest (voice)

Robert Patrick (37)

Race Bannon (voice)

Robert Foxworth (54)

Race Bannon (voice)

Jennifer Hale (24)

Jessie Bannon (voice) / Kate (voice)

Carl Lumbly (45)

Colonel William Marcus (voice)

Jeffrey Tambor (52)

Black Jack Lee (voice)

Kevin Conroy (40)

Unknown

Bruce Locke

Kumar Mukharno (voice)

Jeff Bennett (33)

Gun Captain (voice) / Diver (voice)

Theresa Saldana (42)

Estella (voice)

Kathleen Freeman (77)

Unknown

Thomas Gibson (34)

Paul Mornay (voice)

Mayim Bialik (20)

Julia (voice) / Lucy (voice)

Kenneth Mars (61)

Unknown

Lucy Liu (27)

Melana (voice)

John Mariano (36)

Unknown

Charles Napier (60)

Hinkle (voice)

Edward Winter (59)

President (voice)

David Ackroyd (56)

Ezekiel Rage (voice)

Andreas Katsulas (50)

Stephano DePace (voice)

Robert Ito (65)

/ President Horkarno (voice)

Mark L. Taylor (45)

Brother James (voice)

Philip Maurice Hayes (32)

Deke (voice)

Paxton Whitehead (58)

Commander (voice)