Alfred Hitchcock’s 1972 film Frenzy was widely considered a return to form for the master of suspense, then in his seventh decade.  “This is the kind of thriller Hitchcock was making in the 1940s, filled with macabre details, incongruous humor, and the desperation of a man convicted of a crime he didn’t commit,” wrote Roger Ebert.  “We are nearly back in the days of his great English films,” opined Penelope Gilliatt in The New Yorker, while Vincent Canby in The New York Times praised it as a “passionately entertaining film.”  From his…