You can predict how every single episode is going to go and how - conveniently - the murderer always confesses at the end when J B Fletcher confronts him/her with rock solid assuredness she has it right. The formula does get old pretty quickly, but Mrs. Fletcher is a fun character and Angela Lansbury clearly had a good time with this show. In addition, a lot of older actors got work they might not have otherwise gotten, even though many of them were good actors and at least once were very A list. A fun way to spend an hour now and then but it would never have lasted as long as it did if it hadn't had Angela Lansbury.