Director: Peter Lorre
Script: Peter Lorre, Axel Eggebrecht, Benno Vigny unter Mitarbeit von Helmut Käutner nach einer Idee von Egon Jameson/Jacobson
Cast: Peter Lorre, Karl John, Renate Mannhardt, Johanna Hofer, Gisela Trowe
Camera: Václav Vich
Editor: Carl Otto Bartning
Music: Willy Schmidt-Gentner
Producers: Arnold Pressburger, Fred Pressburger
Production: Arnold Pressburger Filmproduktion

In Peter Lorre’s sole work as director, two men who worked in medical research during the war, meet again in a refugee camp: the one became a Nazi, and hoodwinked the other, his boss Dr. Rothe, to such an extent that he murdered his beloved. The crime remained unpunished. Until now. In virtuoso flashbacks, Der Verlorene tells a story about the past, which refuses to fade away until justice is served.