- Faye Dunaway
- Denise Kreisler
- Oskar Werner
- Professor Egon Kreisler
- Lee Grant
- Lili Rosen
- Sam Wanamaker
- Carl Rosen
- Lynne Frederick
- Anna Rosen
- David de Keyser
- Joseph Joseph
- Della McDermott
- Julia Strauss
- Genevieve West
- Sarah Strauss
- Luther Adler
- Professor Weiler
- Wendy Hiller
- Rebecca Weiler
- Julie Harris
- Alice Fienchild
- Nehemiah Persoff
- Mr. Hauser
- Maria Schell
- Mrs. Hauser
- Paul Koslo
- Aaron Pozner
- Jonathan Pryce
- Joseph Manasse
- Brian Gilbert
- Laurenz Schulman
- Georgina Hale
- Lotte Schulman
- Adele Strong
- Mrs. Schulman
- Milo Sperber
- Rabbi
- Max von Sydow
- Captain Schroeder
- Malcolm McDowell
- Max Gunter
- Helmut Griem
- Otto Schiendick
- Keith Barron
- Purser Mueller
- Anthony Higgins
- Seaman Berg
- Ian Cullen
- Radio Officer
- Donald Houston
- Dr. Glauner
- David Daker
- First Officer
- Constantine Gregory
- Navigation Officer
- Don Henderson
- Engineering Officer
- Ina Skriver
- Singer
- Orson Welles
- Jose Estedes
- James Mason
- Dr. Juan Remos
- Katharine Ross
- Mira Hauser
- Victor Spinetti
- Dr. Erich Strauss
- Michael Constantine
- Luis Clasing
- José Ferrer
- Manuel Benitez
- Ben Gazzara
- Troper / Morris Troper
- Fernando Rey
- President Bru
- Bernard Hepton
- Milton Goldsmith
- Günter Meisner
- Robert Hoffman
- Marika Rivera
- Madame in Bordello
- Janet Suzman
- Leni Strauss
- Frederick Jaeger
- Werner Mannheim
- Denholm Elliott
- Admiral Canaris
- Leonard Rossiter
- Commander Von Bonin
- Philip Stone
- Secretary
- Tony Allen
- Steward
- Ben Aris
- German Jewish Passenger
- Frances Baker
- Mrs. Johnson
- Jerry Baker
- Passenger
- Emily Bolton
- Local Woman
- Derek Chafer
- Man in Brothel
- Pauline Chamberlain
- Woman at Dinner Table
- Luis Ciges
- President Bru's Secretary
- George Lane Cooper
- Brownshirt
- Maxwell Craig
- Passenger
- Gerry Crampton
- Crewman
- George Curtis
- Passenger
- Carl Duering
- German Ambassador
- Harry Fielder
- Refugee on Ship
- Laura Gemser
- Estedes' Friend
- Brian Hall
- Ship Waiter
- Robin Halstead
- S.S. Photographer
- Alan Harris
- Dancing Officer in Brothel
- Walter Henry
- Passenger
- George Hilsdon
- Attacker on Ships Bridge
- Lew Hooper
- Passenger
- Bernard Kay
- Cuba Harbor Pilot
- Bernard Kaye
- Harbour Pilot
- Eric Kent
- Steward
- Antonio Lara
- Journalist
- Tom Laughlin
- Engineering Officer
- Gary McDermott
- Koster - Helmsman
- Jay McGrath
- Dancing Passenger
- Rosalind Mendleson
- Passenger
- James Muir
- Passenger
- Roy Pattison
- Crewman
- Charles Price
- Crewman
- Bob Raymond
- Man in Brothel
- Mike Reynell
- Ships Officer
- Vikki Richards
- (uncredited)
- Henry Roberts
- Passenger
- Laurie Rose
- Passenger
- Bunny Seaman
- Passenger
- Ian Selby
- Passenger
- Guy Standeven
- Passenger at Meeting in Cinema
- Barry Summerford
- Officer on Ship
- John Tatham
- Dancing Man in Brothel
- Colin Thomas
- Passenger
- Rita Tobin-Weske
- Passenger
- Sonnie Willis
- Passenger
- Fred Wood
- Passenger - MS St Louis
