Peter Lorre was a Hungarian and American actor, active first in Europe and later in the United States. He began his stage career in Vienna, in the Austro-Hungarian Empire, before moving to Germany where he worked first on the stage, then in film in Berlin in the late 1920s and early 1930s. Lorre caused an international sensation in the Weimar Republic–era film M (1931), directed by Fritz Lang, in which he portrayed a serial killer who preys on little girls. Known for his timidly devious characters, his appearance, and his accented voice, Lorre was frequently caricaturized during and after his lifetime and the cultural legacy of his persona remains in media today.

Casablanca is a 1942 American romantic drama film directed by Michael Curtiz and starring Humphrey Bogart, Ingrid Bergman, and Paul Henreid. Filmed and set during World War II, it focuses on an American expatriate (Bogart) who must choose between his love for a woman (Bergman) and helping her husband (Henreid), a Czechoslovak resistance leader, escape from the Vichy-controlled city of Casablanca to continue his fight against the Germans. The screenplay is based on Everybody Comes to Rick's, an unproduced stage play by Murray Burnett and Joan Alison. The supporting cast features Claude Rains, Conrad Veidt, Sydney Greenstreet, Peter Lorre, and Dooley Wilson.