British actor Jon Finch's splendid reputation in Shakespearean repertory led to his being cast in the 1970 Roman Polanski film version of MacBeth. Finch's ability to convey "cross purposes" by having his voice say one thing and his eyes another, served him well in Hitchcock's 1972 Frenzy. In the opening scene, we are meant to assume that Finch is a serial killer--and once we find out he isn't, we can still understand why everyone around him thinks he is. Jon Finch's skills have not always been so well exploited in his subsequent films appearance, in which he is often as not one of many leading actors working in ensemble. ~ Hal Erickson, All Movie Guide