[1] It was a loose sequel to the 1929 novel The Piccadilly Murder, featuring two of the characters from the earlier work the unprepossessing but shrewd Ambrose Chitterwick and Chief Inspector Moresby of Scotland Yard.

[4] The mild-mannered Lawrence Todhunter finds out he hasn't long to live, due to a heart condition.

He decides to do the world a last service by killing a truly evil person, knowing he will not have to face the consequences.

Despite his best efforts, Todhunter cannot convinces the authorities he is the guilty party and enlists Ambrose Chitterwick to try and prove the matter.

Produced by the BBC it featured Mervyn Johns as Todhunter, Kynaston Reeves as Chitterwick and Ballard Berkeley as Moresby.