This episode features Dr Thorndyke, played by John Neville, who is first a medical man and second a solver of mysteries. A young girl has been murdered in her boarding house and the solution looks obvious - but is it? Neville plays the sleuth with aplomb and this is a strong opening episode. The character is arrogant, capable, and likable - and of course his intelligence makes his police colleagues and/or adversaries look like idiots!

Max Carrados, the blind detective, solves the case of a bank teller shot at his counter.

Horace Dorrington solves the mystery of a case of sabotage on a bicycle track.

Simon Carne devises an ingenious way of keeping the Duchess of Wiltshire's diamonds safe from theft.

Carnacki solves the case of an invisible horse that is haunting a family of the eve of a wedding.

Horace Dorrington clears up the mystery of the theft of a valuable diamond.

Dixon Duce helps solve a murder case.

Jonathan Pride gets involved in a case involving a secret weapon, an eccentric inventor and forged roubles.

Lady Molly of Scotland Yard solves the murdeer of a respectable man.

Arhtur Hewitt gets mixed up in a case involving voodoo and the disappearance of a dead body.

Conman and invesigator Romney Pringkle exposes a swindle and makes a profit.

Bernard Sutton is called in to help stop a series of jewel robberies.

Arthur Hewitt and Jonathan Pride band together to find a bank clerk who has disappeared with £ 15,000.