Dr Thorndyke has to decypher a code to stop a plot to assassinate a Russian Grand Duke. Air Date : 26th-Mar-1973

Polly Burton assists in soving the case of a grl found dead on a seat of an underground train. Air Date : 29th-Jan-1973  Read More

Inspecor Lipinski investigates the theft of a 500 carat diamond. Air Date : 5th-Feb-1973  Read More

Professor Van Dusen, the 'Thinking Machine', boasts that he can think his way out of a prison cell. When he is locked up he is given the chance to prove that he can escape by the power of his mind alone. Air Date : 12th-Feb-1973  Read More

Laxworthy and two friends secure the safety of the plans for the first torpedo to be used by the French navy. Air Date : 19th-Feb-1973  Read More

Valmont has to help break a ring of counterfeiters. Air Date : 26th-Feb-1973  Read More

Lieutenant Holst of Copenhagen has to help a Russian countess who claims her brother-in-law aims to kill her. Air Date : 4th-Mar-1973  Read More

Professor Van Dusen must find out why a young woman had a perfectly healthy finger cut off by the eminent surgeon Prescott. Air Date : 11th-Mar-1973  Read More

In turn-of-the-century Vienna, Dagobert Trostler investigates a poison pen case. Air Date : 19th-Mar-1973  Read More

Dr Thorndyke has to decypher a code to stop a plot to assassinate a Russian Grand Duke. Air Date : 26th-Mar-1973  Read More

William Drew of the foreign Office investigates an unusual crime. Air Date : 2nd-Apr-1973  Read More

Charles Dallas is led into a strange and sinister adventure in the aftermath of a sensational murder trial. Air Date : 9th-Apr-1973  Read More

Gold disappears from the strongroom of the RMS Oceanic and its purser, Mr Horrocks, tries to discover what has happened. Air Date : 16th-Apr-1973  Read More

Hagar the Gypsy sets out to prove that Detective Sergeat Grubber is wrong about who killed Mrs Arryford. Air Date : 7th-May-1973  Read More