Before the Mitchell Brothers made what is probably their masterpiece with 1973's 'The Resurrection of Eve', they made this film. Behind the Green Door is a strange and surreal porn flick that features everything you'd expect (and more!) in a weird dream-like setting. The film is cited by some to be an influence on Stanley Kubrick's final film Eyes Wide Shut - and it's certainly very obvious why. The plot focuses on the idea of a young girl being kidnapped. She is taken to a strange underground club, where the clients wear elaborate masks and costumes, and forced to perform various sex acts on stage. As a porn film; Behind the Green Door is likely to be a bit too strange for some, and as a film - there's far too little going on in the plot departments and despite the setting, it soon degenerates into a simple collection of porn sequences. It is very well filmed, however, and while we're seeing things like blow jobs and lesbian sex that we've all seen in many other films; the Mitchell Brothers somehow manage to make it seem different to what we've seen before due to the execution. I can't say that the film works as a complete whole - I didn't find it very erotic and there's really not a great deal going on outside of the many sex scenes. Still, this is undoubtedly an interesting film and followers of XXX stuff will likely want to track it down.