Alexander Davion

as Dr. Crawford

David Hemmings

as Roger Westcott

Charles Tingwell

as Captain Jaffe

Peter Fraser

as Donnie Chaffer

Tony Wager

as Jensen

Keith Buckley

as Scotty McIntyre

David Savile

as Gerry

Geoffrey Kenion

as Dave

Barry Ashton

as Frank

David Munro

as Ken

Hedger Wallace

as Commander

Lew Luton

as Officer

Derek Martin

as Guard