The final episode held the record until 1996 for the biggest-ever audience for a single programme on British TV, with an audience of over 27 million viewers. The record was broken 15 years later by the series Only Fools and Horses (1981) with 27.6 million viewers.
The manor house which was used as the filming location for Grantleigh Manor is 18th century Grade II listed building, Cricket St. Thomas, in Somerset, designed by Sir John Soane. It belonged to the father-in-law of series creator Peter Spence and now forms part of a country hotel with its own wildlife park. The lodge is in reality several miles from the manor house, but with the magic of TV appears to be much closer.
Years later, 10 episodes (six adaptations and four specially written) appeared on BBC Radio 2, starring Penelope Keith and Angela Thorne reprising their roles, and Keith Barron as Richard DeVere.
Angela Thorne's husband Peter Penry-Jones played Julian Gayforth in the final two episodes, as an opponent of Richard DeVere at Cavendish Foods.
The first name of Audrey's late husband was spelled "Marton", not "Martin". This unusual spelling, seen on his gravestone in Back to the Manor (1981), began as a typo when Peter Spence, the creator, was typing a copy of the original radio script on which the TV version was based. John Lloyd, the producer of the radio play, decided to keep this spelling because "the aristocracy are always mucking about with the spelling of things".