The Gay Falcon (1941)

Starring George Sanders, Wendy Barrie, Allen Jenkins, Anne Hunter, Gladys Cooper
Directed by Irving Reis
(actor & director credits courtesy IMDB.com)

Gay Laurence, a womanizing and crime-solving playboy, puts off his marriage and career plans to investigate a woman's parties where valuable belongings are routinely stolen.

The first of several "Falcon" films from RKO Radio Pictures, with the often-underappreciated Sanders a natural for the role of Laurence due to his gentlemanly bearing and suave delivery.  The mystery, with a somewhat obvious conclusion, doesn't seem as well-developed as the film's comedic bits, but it's an enjoyable film, and showcases Sanders' talents and rapport with his leading ladies.