A bombed-out European city, a hunt for a dead man, and black market racketeers selling diluted penicillin that kills children, all scored by a bouncy zither tune that topped the charts for 11 weeks. This deep dive explores the 1949 British film noir classic The Third Man, from Holly Martins’s arrival in a divided Vienna to the twist that Harry Lime is alive, and then goes behind the scenes to understand how this contradictory masterpiece was built.

We look at Graham Greene’s private novella, his 1948 research trip into Vienna’s sewers and nightclubs, and journalist Peter Smolka’s account of the penicillin racket. Then we cover Carol Reed’s six-week location shoot on Benzedrine, Robert Krasker’s expressionist shadows and Dutch angles, William Wyler’s spirit level gift, the discovery of Anton Karas in a wine garden, the Orson Welles ghost-directing myth, his refusal to enter the sewers, the improvised cuckoo clock speech, and the fight with David O. Selznick over the ending and the 11 minutes cut for American audiences.

• How four occupation zones and a rotating international sector created a jurisdictional black hole
• Why diluted penicillin was so dangerous for children with meningitis
• Assistant director Guy Hamilton doubling for Welles in the real Vienna sewers
• The historical errors inside Harry Lime’s Borgias and Switzerland monologue
• The long final shot of Anna walking past Martins, and why Greene admitted Reed was right