"Looking for Alfred" documents Johan Grimonprez's prize-winning film of the same name, an homage to Alfred Hitchcock in the form of a search for the perfect Hitchcock d?ppelganger and vignettes starring those multiple would-be Hitchcocks, reenacting his cameos. Casting calls and screen tests in London, Rotterdam, Los Angeles and New York are documented in film stills and photos. (Professional Hitchcock impersonator Rob Burrage says, "I thought I was...