World War II Behind Closed Doors: Stalin, the Nazis and the West is a 2008 six-episode BBC/PBS documentary series on the role of Joseph Stalin and German-Soviet relations before, during, and after World War II, created by Laurence Rees and Andrew Williams.

It carries new controversial material from the Soviet archives that became available to the public only after the end of the Soviet Union. Each episode lasts approximately one hour and features reenactments of the situations subject.