Pepe Serna
Agent Menendez
Jeffrey Tambor
Dr. Zin
Frank Welker
Snipe / Replicants
Don Messick
Dr. Benton C. Quest / Bandit
Will Estes
Jonny Quest
Peter Renaday
Dr. Victor Devlon
Anndi McAfee
Jessie Kenyon (Bannon)
Ed Gilbert
Commander
George Hearn
President
Rob Paulsen
Hadji
B.J. Ward
3-DAC
Marcelo Tubert
Chef
Granville Van Dusen
'Race' Bannon
Meredith MacRae
Dr. Rachel Quest
Whit Hertford