Premise: The Russia House is a spy novel by John le Carré published in 1989. The title refers to the nickname given to the portion of the British Secret Intelligence Service that was devoted to spying on the Soviet Union. A film based on the novel was released in 1990 starring Sean Connery and Michelle Pfeiffer, and directed by Fred Schepisi. The BBC produced a radio play starring Tom Baker.
Hypothesis: Actor Tom Baker starred in a radio version of The Russia House.