“I'd had a couple of successes in the West End onstage, and I was doing a play by David Mercer at the Criterion called After Haggerty, with Billie Whitelaw. Someone said, 'Oh, Alfred Hitchcock's in tonight'. Next morning, my agent said 'Mr. Hitchcock would like to meet you at 100 Piccadilly'. So, along I went. He said, 'I'm making this picture about a murderer. I'd like you to take the script away and tell me if you'd like to play it'.”