1973-03-26 • 50 min
Dr Thorndyke has to decypher a code to stop a plot to assassinate a Russian Grand Duke.
Julian Glover
Alfred Barton
Graham Seed
Porter
Barrie Ingham
Dr. John Thorndyke
Peter Sallis
Dr. Jervis
Derek Smith
Prof. Popplebaum
Nicholas Selby
Superintendent Miller
George Innes
Adolph Schonberg
Eric McCaine
Insp. Badger
Peter Beton
M. James
Max Faulkner
Mounted Policeman
Reginald Collin
Director
Writer
R. Austin Freeman
Short Story
Harry Moore
Story Editor
