Charade

Audrey Hepburn's husband is murdered and she discovers he was involved in a wartime gold theft. Several men who were his accomplices are after the gold, and they think she knows where it is. Cary Grant keeps turning up and helping her, but his identity keeps shifting. The film is often called the best Hitchcock film Hitchcock never made. The screenplay by Peter Stone has a good ear for banter. Henry Mancini wrote the score. The film failed to include a copyright notice on its prints, which put it in the public domain immediately upon release.