On screen
Cast
13 credited performers
Walter Koenig
Col. Jason Grant
Bruce Campbell
Ray Tanner
Robert Kurcz
Koreman
Leigh Lombardi
Mera
Tom Case
Beck
Judy Levitt
Intrepid Commander
Reavis Graham
Haskell
Reuben Yabuku
Intrepid Pilot
Doug Childs
Grant's Son
Mariafae Mytnyk
Research Assistant
Artwork unavailable
John J. Saunders
Barnes
Artwork unavailable
James A. Courtney
Lieutenant
Artwork unavailable
B.K. Taylor
Additional Voices (voice)