The stories were used as the basis for the long-running BBC television programme Dr. Finlay's Casebook, screened from 1962 to 1971, and radio series of the same name (1970–78). Based on Cronin's novella entitled Country Doctor, the storylines centred on Dr. Finlay's general medical practice in the fictional Scottish town of Tannochbrae during the late 1920s. The main characters were Dr. Finlay, a junior partner in the practice, played by Bill Simpson, Dr. Cameron, the craggy senior partner, played by Andrew Cruickshank, and Janet, their unflappable housekeeper and receptionist at Arden House, played by Barbara Mullen. Dr. Finlay returned to television with the ITV series, Doctor Finlay, continuing the stories into the late 1940s, which featured David Rintoul as Dr. Finlay, Ian Bannen as Dr. Cameron, and Annette Crosbie as Janet. It later aired in the U.S. on PBS' Masterpiece Theatre.
In the books, Dr Finlay worked alone. He was charming and became well-acquainted with his patients over many years. It was thus his trademark to know them from birth to death and so provide a continuous relationship.