Hercule Poirot tries desperately to save a kidnapped child, Miss Jane Marple goes beyond the grave to protect a dead man's heirs from disaster, and Mr. Harley Quin tracks down a cunning killer

Three blind mice -- Strange jest -- Tape measure murder -- Case of the perfect maid -- Case of the caretaker -- Third floor flat -- Adventure of John Waverly -- Four and twenty blackbirds -- Love detectives