Black Coffee

About the show

Scientist Sir Claud Amory discovers that his formula for a new explosive has been stolen and gathers his household while awaiting Hercule Poirot. Amory is found dead after the lights go out, and Poirot investigates the poisoned coffee, a duplicate safe key, and a blackmail scheme linked to an international spy’s daughter. The suspects’ efforts to protect one another and conceal the formula complicate the case until Poirot exposes the thief and murderer.