Joan Sanderson, Helen Fraser, John Quayle . It may be a silly story which falls into place too easily, but the second half is full of laughs. The dialogue is sharp and every case of mistaken identity is funny, so it’s hard to be critical. The first half is only weak because the pace is too fast, and it does strain credibility the way the characters spout out the exposition. Perhaps if Alan was still living there, his presence would have helped the first half, made it seem less artificial. But, that minor point aside, this episode is definitely a winner. 9/10
