Michael Carreras Director, Producer, Writer Eric Porter Capt. Lansen Actor Hildegard Knef Eva Peters Actor Suzanna Leigh Unity Webster Actor Tony Beckley Harry Tyler Actor Nigel Stock Dr. Webster Actor Neil McCallum First Officer Hemmings Actor Ben Carruthers Ricaldi Actor Jimmy Hanley Patrick Actor James Cossins Nick Actor Dana Gillespie Sarah Actor Victor Maddern The mate Actor Reg Lye The Helmsman Actor Norman Eshley Jonathan Actor Michael Ripper Sea Lawyer Actor Donald Sumpter Sparks Actor Alf Joint Jason Actor Charles Houston Braemer Actor Darryl Read El Diablo (uncredited) Actor