Calificación
Reparto

Jack Palance
Omus

Carol Lynley
Nikki

Barry Morse
Dr. John Caball

John Ireland
Senator Smedley

Nicholas Campbell
Jason Caball

Anne-Marie Martin
Kim Smedley

Greg Swanson
Sparks (voice)

Mark Parr
Sparks

William Hutt
Lomax (voice)

Ardon Bess
Merrick

Lynda Mason Green
Lunar technician

Albert Humphries
Robot technician

Bill Lake
Spacesuited man