Green for Danger

It's 1944 at Heron's Park Hospital. A buzz bomb flies overhead resulting in casualties. Joseph Higgins is brought to the hospital but dies on the operating table. Anesthetist Barney Barnes (Trevor Howard) is suspected but he refuses to accept responsibility. Sister Bates claims to have evidence but is murdered before revealing it. Scotland Yard Inspector Cockrill (Alistair Sim) comes to investigate.

There has been many iconic literary British murder mystery. I've never heard of this one nor the novelist Christianna Brand. Alistair Sim gives it charisma. He drives the movie but I don't think the character turns into a franchise. He has the potential but it's not used. I do have some minor questions about the mystery. All in all, this is pretty good.