Robert Culp

Character: Narrator

David Carradine

Character: John Tucker (archive footage) (uncredited)

Dan Haggerty

Character: Dr. Mike Campbell (archive footage) (uncredited)

Persis Khambatta

Character: Colbalt (archive footage) (uncredited)

Cameron Mitchell

Character: Dutch / Miller (archive footage) (uncredited)

Oliver Reed

Character: General Turner (archive footage) (uncredited)