David Anthony, a Harley Street physician, swaps duties with his brother, a medical missionary in Africa.

Agatha Christie tale of a man on trial for murder: a trial featuring surprise after surprise. Not to be confused with the later Hollywood adaptation.

At the end of World War II, a Royal Navy submarine on routine patrol strikes and detonates a mine. The subsequent explosion sinks the submarine, killing most of its crew. Frantic efforts are taken to rescue those remaining alive.