What interests Hitchcock? Not precisely character: he creates it, and his flair for casting sustains it, but it is character directed to the ends of a limited dramatic situation, star personality cut to size, Not, certainly, professional crime, the mechanics of a bank robbery or the operations of a spy ring. Professionalism hints at routine, and Hitchcock's is the art of the unexpected—a celebration of that jarring moment when, walking in the dark down a staircase which you know every foot of the way, you suddenly hit bottom one step too soon. When Hitchcock talks of his own technique, it is often in terms of a deliberate avoidance of cliché. (p. 161)

What does, then, interest this bland, smooth man? The quirkish, English Hitchcock and the American Hitchcock who deals in the twists and turns of the mind are not perhaps as far apart as they seem. Humour...