Muir holds an MA Honours degree from Hertford College, Oxford University, in Politics, Philosophy and Economics.
Muir began his career in Television in 1963 holding a senior post in Border Television prior to joining ABC TV and then Thames TV (the London commercial television licensee) in 1968.
Muir founded and was the first Chief Executive of Thames Television International (1974-1982), ITV’s principal exporter of television programming world-wide which won The Queen’s Award for Export. He also served as a board member of Euston films from 1974 whose productions included MINDER, THE SWEENEY and WIDOWS amongst many others.
Muir was appointed to the Board of Thames Television PLC as The Director of Programmes in 1982 to 1986 and also became the Deputy Chairman of Euston Films from 1982 to 1986.
During his time as The Director Of Programmes of Thames Television PLC, Muir commissioned many successful programmes including The Bill, which ran for over 20 years as a linchpin in the ITV schedule.
Muir left Thames Television in 1986 to form Celtic Films, specialising in feature films and major TV film series. Productions have included THE SAINT (1989), six TV movies for LWT, THE MONK (1990), an Anglo-Spanish feature film starring Paul McGann and Sophie Ward, RED FOX (1991), a three hour mini-series for LWT starring John Hurt, Jane Birkin and Brian Cox, and the 14 feature-length action-adventure SHARPE films starring Sean Bean, Liz Hurley and Pete Postlewaite set during the Napoleonic wars for Carlton Television. Over five years SHARPE commanded an average audience share of 47% against all the other channels with an average audience of 10 million people per episode.
Following the success of the SHARPE films, Muir initiated and developed HORNBLOWER for ITV, eight two-hour films from the novels by C.S. Forester.
Muir’s next production was a TV film, A LIFE FOR A LIFE: The True Story Of Stephen Kiszko, a gripping drama about one of the most tragic miscarriages of justice in recent years, starring the Oscar-winning American actress Olympia Dukakis and Tony Maudsley. It received tremendous critical acclaim when it was broadcast on ITV and was nominated for a BAFTA Award in the Best Single Drama category. The production also won two RTS Awards for Best Network Newcomer (Tony Maudsley) and Best Screenplay (Peter Berry) and was the ITV entry for the 1999 Prix Italia Television Festival.
In 2001 Muir produced the feature film GIRL FROM RIO, a romantic comedy set between London and Brazil, starring Hugh Laurie and which went on to win Best International Film at The Hollywood Film festival.
Muir produced the return of the SHARPE franchise “SHARPE’S CHALLENGE” a 2 x 71 minutes mini series and “SHARPE’S PERIL” also a 2×71 minutes mini series for ITV, again starring Sean Bean.
Muir also served on the board of Border Television PLC as a non executive Director from 1986 to 2000. In the 1990s Border expanded its business into radio by winning three regional radio franchises. Border Television was eventually sold to Capital Radio in 2000.