Roy Marsden

as Sturmbannführer Toberg, SS (uncredited)

as Oberon

as Alpha

as Commander Adam Dalgliesh

as Crael

as Mervyn Stockwood

as Fred

as Bright

as Joseph

as Sidney Frederick Haynes

as Gerry Gurland

as Mr. Stoker

as Gerald Overton

as John Stockton

as Ted Cartwright

as Alien Invisible

as Crael

as Self

as Lt. David Stanton

as Adam Dalgliesh

as Frank Turner