Final film of Lya Christy.
Peter Lorre seldom sang in movies, and when he did, later in his career, as in "Silk Stockings" (1957), he was dubbed. But he had been a cabaret singer in his youth, and this film contains possibly the only example of his singing when he does a duet with Nora Gregor, "Ja die Polizei, die hat die schönsten Männer," in which they sing about how young women love policemen.