Omus

Jack Palance

Acting

Nikki

Carol Lynley

Acting

Dr. John Caball

Barry Morse

Acting

Senator Smedley

John Ireland

Acting

Jason Caball

Nicholas Campbell

Acting

Kim Smedley

Anne-Marie Martin

Acting

Sparks (voice)

Greg Swanson

Acting

Sparks

Mark Parr

Acting

Lomax (voice)

William Hutt

Acting

Merrick

Ardon Bess

Acting

Lunar technician

Lynda Mason Green

Acting

Robot technician

Albert Humphries

Acting

Spacesuited man

Bill Lake

Acting