Hollywoodland (2007)

A uniquely compelling exploration of fame and identity. The drama, inspired by one of Hollywood's most infamous real-life mysteries, follows a 1950s private detective who, investigating the mysterious death of "Superman" star George Reeves, uncovers unexpected connections to his own life as the case turns ever more personal. The torrid affair Reeves had with the wife of a studio executive might hold the key to the truth.

Official website: http://www.hollywoodlandmovie.com/