After the Thin Man (1936)

Synopsis
This second of MGM's Thin Man films reteams William Powell and Myrna Loy as, respectively, bibulous private detective Nick Charles and his socialite wife Nora. The Charleses are sucked into another murder case via Nick's lovely cousin Elissa Landi, whose husband Alan Marshall has vanished. Hubby has been conducting an affair with nightclub thrush Dorothy McNulty (later known as Penny Singleton) and is also blackmailing gangsterish Joseph Calleia. When the corpses begin piling up, Nick and Nora try to piece the clues together, with the earnest assistance of Jimmy Stewart, who carries a torch for Landi. You won't believe who turns out to be the murderer in this one--then again, given the plot's strict adherence to "least likely suspect" formula, you probably will. ~ Hal Erickson, All Movie Guide