From NetFlix:

Chief Inspector Roderick Alleyn (Patrick Malahide) is a sophisticated detective who’s comfortable among society types in 1940s Britain but equally able to navigate the trenches when duty calls. His skills come in handy when he’s handed cases that mystify his colleagues — such as the murder of an artist’s model, the mysterious death of high-powered politicians and barristers and the blackmailing of an upper-crust debutante.

We were a bit disappointed in set 1 of Inspector Alleyn. Kathy and I found discs 1 and 3 boring. Discs 2 and 4 were better but not great. These period pieces are a bit slow and antiquated. However, subtitles are available which is a plus for many viewers.