Stephen Boyd as Leyton van Dyk

Ray Milland as Pete Handley

France Nuyen as Atanga

Cameron Mitchell as Bruno Carstens

Brendon Boone as Jim Handley

Michael Kirner as Mark Handley

John van Dreelen as Lee

John Stacy as Bill Stryker

George Wang as Wong

Marie du Toit as Lucie Handley

Ian Yule as Task Force Leader

Bill Brewer as Ship's Captain

Romano Puppo as Alberto

Larry McEvoy as Dr. Warden