Three hour-long mysteries. "The kidnapped prime minister": Poirot is called to solve the case when Britain's prime minister vanishes on the eve of important international negotiations. "The adventure of the western star": Poirot is called to investigate when a Belgian film star's priceless diamond disappears after she receives threatening letters. "How does your garden grow?" : An alleged Communist conspiracy casts suspicion on the Russian servant...

Underdog detective 'Dangerous' Davies toils at a small London police station, where his slicker colleagues taunt him and his boss calls him the last detective he would put on a big case. That makes it all the sweeter when he cracks the big ones anyway.

As Molly MacDonald comes to terms with becoming a widow, Lexie and the estate employees must come to terms with her new position in life as fiance of the laird, Archie. Includes all ten episodes from the fourth series.