"Cat Among the Pigeons" is one of the best of this series. It's faithful to the book, which has a strong story, and is filled with great production values and atmosphere, and the acting -- absolutely wonderful.
Poirot is asked by a friend, Miss Bulstrode, to present a sports prize at her girls' school, Meadowbank. Then she asks him to stay on, as she wants to retire and choose a successor and would like his opinion. The obvious one for the job, Miss Chadwick (Susan Wooldridge) is a little too conservative for Miss Bulstrode.
Things turn chaotic. The country of Ramat, overrun by anti-monarchy revolutionaries, has caused the only surviving heir to the throne, Princess Shaista, to get out. She is sent to Meadowbank and believes people are trying to kill her. Miss Springer, the gym teacher, is a sadistic piece of work who enjoys finding out peoples' secrets. She is later found stabbed with a javelin.
Each of the rest of the staff seems to be hiding something. There is another murder of another teacher, an attack on a teacher, and the princess is kidnapped.
Tennis rackets, rubies, revolution, fakes, and undercover work all figure in as Poirot attempts to find the culprit - the cat among the pigeons.
Terrific, with Suchet the perfect Poirot as ever, and with brilliant performances by Walter and Wooldridge, both very accomplished actresses. Endeavor fans may recognize Anton Lesser as the investigator helped by Poirot.
Well worth viewing.