FILTH Review starring James McAvoy & Drugs! Oh, and sex and general meanness. by WWAM! Get weird with Wewatchedamovie in our review of FILTH! In this film Filth a cop played by James McAvoy is up for a promotion but his life is beyond messed up as he goes through filth drinking, snorting and screwing anything and anyone he can. Its full of filth. AND entertainment. AND weirdness. We review Filth! Wash your clothes.