One of the oldest kind of crime movies - who done it (or whodunit) usually keeps the audience gripped until the end with lots of surprises and twists.
Dr Edward "Fitz" Fitzgerald has one special skill - he can get into the criminal mind, which makes him invaluable for the police.
During the live radio show someone is killing the people involved.
Hercules Poirot travels on the Orient Express when one of the guests is found dead with multiple stab wounds.
Guests on a dinner party have to find which one of them is the killer. Based on a board game "Clue".