Episodes
1. The Mysterious Death on the Underground Railway
January 29, 1973
50 min
Polly Burton assists in soving the case of a grl found dead on a seat of an underground train.
Guest Stars:
John Savident, Tom McCarthy, Anthony Higgins, Richard Beckinsale, Judy Geeson
2. Five Hundred Carats
February 5, 1973
50 min
Inspecor Lipinski investigates the theft of a 500 carat diamond.
Guest Stars:
Alan Tilvern, Patrick Barr, Aideen O'Kelly, Richard Morant, Martin Jarvis
3. Cell 13
February 12, 1973
50 min
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.
Guest Stars:
Ray Smith, Clifford Rose, Douglas Wilmer, Michael Gough, Nicholas Courtney
4. The Secret of the Manifique
February 19, 1973
50 min
Laxworthy and two friends secure the safety of the plans for the first torpedo to be used by the French navy.
Guest Stars:
Peter Birrel, Bernard Hepton, Bruce Boa, Gary Watson, Christopher Neame
5. The Absent-Minded Coterie
February 26, 1973
50 min
Valmont has to help break a ring of counterfeiters.
Guest Stars:
David Battley, Charles Gray, Jerold Wells, George Moon, Suzanne Neve
6. The Sensible Action of Lieutenant Hoist
March 4, 1973
50 min
Lieutenant Holst of Copenhagen has to help a Russian countess who claims her brother-in-law aims to kill her.
Guest Stars:
John Thaw, Virginia Stride, Catherine Schell, Philip Madoc, Anthony Newlands
7. The Superfluous Finger
March 11, 1973
50 min
Professor Van Dusen must find out why a young woman had a perfectly healthy finger cut off by the eminent surgeon Prescott.
Guest Stars:
Douglas Wilmer, William Mervyn, Veronica Strong, Laurence Payne, Charles Morgan
8. Anonymous Letters
March 19, 1973
50 min
In turn-of-the-century Vienna, Dagobert Trostler investigates a poison pen case.
Guest Stars:
Ronald Lewis, Nicola Pagett, Carolyn Jones, Michael Aldridge, Francis de Wolff
9. The Moabite Cypher
March 26, 1973
50 min
Dr Thorndyke has to decypher a code to stop a plot to assassinate a Russian Grand Duke.
Guest Stars:
Julian Glover, Graham Seed, Barrie Ingham, Peter Sallis, Derek Smith
10. The Secret of the Foxhunter
April 2, 1973
50 min
William Drew of the foreign Office investigates an unusual crime.
Guest Stars:
Derek Jacobi, Richard Pearson, Ralph Truman, Lisa Harrow, Simon Gough
11. The Missing Q.C's
April 9, 1973
50 min
Charles Dallas is led into a strange and sinister adventure in the aftermath of a sensational murder trial.
Guest Stars:
Robin Ellis, John Phillips, John Barron, Jack May, Celia Bannerman
12. The Looting of the Species Room
April 16, 1973
50 min
Gold disappears from the strongroom of the RMS Oceanic and its purser, Mr Horrocks, tries to discover what has happened.
Guest Stars:
Ronald Fraser, Paul Hardwick, Jean Marsh, Norman Bird, Stephen Yardley
