(Review is of both parts)
Squadron Leader Gerry Burton and his sister Joanna have just moved into the quiet village of Lymston and walk straight into a scandal. Someone is sending hateful, lie-filled poison letters to villagers. The situation escalates when Angela Symmington, the wife of the local solicitor, gets one of these letters and (apparently) commits suicide. However, Miss Maple is not convinced that it was suicide.
This 2-part Miss Marple instalment started well. The first part is very engaging as we meet the people of Lymston, discover their dynamics and watch new relationships being formed. There's also the intrigue of the poison pen letters and the death of Mrs Symmington.
The second part is still good but the plot is less tight. Some developments are clumsy and implausible and the perpetrator is signalled quite early in the piece.
Overall, not brilliant but a decent Miss Marple case.