The Rivals of Sherlock Holmes (Season 2)

The Mysterious Death on the Underground Railway (Episode 1)

Writer: Baroness Emmuska Orczy

Air date: 1973-01-29

Runtime: 50 min

Overview: Polly Burton assists in soving the case of a grl found dead on a seat of an underground train.

Five Hundred Carats (Episode 2)

Writer: George Griffith

Air date: 1973-02-05

Runtime: 50 min

Overview: Inspecor Lipinski investigates the theft of a 500 carat diamond.

Cell 13 (Episode 3)

Writer: Jacques Futrelle

Air date: 1973-02-12

Runtime: 50 min

Overview: 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.

The Secret of the Manifique (Episode 4)

Writer: Gerald Kelsey

Air date: 1973-02-19

Runtime: 50 min

Overview: Laxworthy and two friends secure the safety of the plans for the first torpedo to be used by the French navy.

The Absent-Minded Coterie (Episode 5)

Air date: 1973-02-26

Runtime: 50 min

Overview: Valmont has to help break a ring of counterfeiters.

The Sensible Action of Lieutenant Hoist (Episode 6)

Air date: 1973-03-04

Runtime: 50 min

Overview: Lieutenant Holst of Copenhagen has to help a Russian countess who claims her brother-in-law aims to kill her.

The Superfluous Finger (Episode 7)

Air date: 1973-03-11

Runtime: 50 min

Overview: Professor Van Dusen must find out why a young woman had a perfectly healthy finger cut off by the eminent surgeon Prescott.

Anonymous Letters (Episode 8)

Writer: Anthony Steven

Air date: 1973-03-19

Runtime: 50 min

Overview: In turn-of-the-century Vienna, Dagobert Trostler investigates a poison pen case.

The Moabite Cypher (Episode 9)

Writer: Reginald Collin

Air date: 1973-03-26

Runtime: 50 min

Overview: Dr Thorndyke has to decypher a code to stop a plot to assassinate a Russian Grand Duke.

The Secret of the Foxhunter (Episode 10)

Writer: Gerald Kelsey

Air date: 1973-04-02

Runtime: 50 min

Overview: William Drew of the foreign Office investigates an unusual crime.

The Missing Q.C's (Episode 11)

Air date: 1973-04-09

Runtime: 50 min

Overview: Charles Dallas is led into a strange and sinister adventure in the aftermath of a sensational murder trial.

The Looting of the Species Room (Episode 12)

Writer: Ian Kennedy Martin

Air date: 1973-04-16

Runtime: 50 min

Overview: Gold disappears from the strongroom of the RMS Oceanic and its purser, Mr Horrocks, tries to discover what has happened.

The Mystery of the Amber Beads (Episode 13)

Writer: Owen Holder

Air date: 1973-05-07

Runtime: 50 min

Overview: Hagar the Gypsy sets out to prove that Detective Sergeat Grubber is wrong about who killed Mrs Arryford.