John Koenig
Helena Russell
Alan Carter
Sandra Benes
Dr. Mathias
Maya / Servant of the Guardian
Victor Bergman
Tony Verdeschi
Paul Morrow
David Kano
Kate
Bill Fraser / Fraser
Yasko
Ben Vincent
Medic (uncredited) / Command Center Technician (uncredited)
Creature / Lizard Animal
June
Eagle Pilot (voice) / James Kelly
Guido Verdeschi / Parks
Ed Spencer
Alibe
Carla / Female Alien
Stewardess / Main Mission Operative (uncredited)
Mentor / Cabot Rowland
