This is the most under-appreciated Agatha Christie film in my opinion. The movie has a top grade cast (for the most part) including Peter Ustinov, Lauren Bacall, Piper Laurie & Hayley Mills. Mills and Bacall give the best supporting performances as an Archeologist and Member of Parliment respectively. The solution to the murder of evil mother Laurie isn't an easy one, but it all makes sense in the end. The plot moves along at a good pace, and features beautiful locations. If you want a good mystery, go and rent Appointment with Death!