Rudolf Fernau as Dr. Frank Crippen

René Deltgen as Oberinspektor Düwell

Anja Elkoff as

Gertrud Meyen as Lucie Talbot

Rolf Weih as

Max Gülstorff as "Montrose"-Kapitän Kendall

Paul Dahlke as Crippens Anwalt

O.E. Hasse as Prof. Morrison

Ernst Waldow as Schiffsarzt Dr. Hidden

Wilhelm Bendow as Apotheker Harras

Heinz Schorlemmer as

Walter Lieck as

Robert Bürkner as

Günther Hadank as

Knut Hartwig as

Adolf Fischer as

Olga Engl as

Hella Thornegg as

Louis Brody as

Albert Johannes as

Josef Keim as

Elisabeth Scherer as

Käthe Jöken-König as

Ernst G. Schiffner as

Peter Busse as

Leo Peukert as