Dick Clement later said, "We were rewriting the ending as we went along and that's never good... In hindsight, I always think you need to get those decisions out of the way before you get on the set. But, on the whole, it was a good shoot. Michael Caine was a fantastic trouper on the film, he was really a joy to work with, enormously supportive. I can’t be more appreciative of his work on it and how professional he was. In a way, Michael had the straightest part in the film, he was almost the straight man. He kept saying to me, 'You realise I'm having to carry all the plot here?'"