Innes Lloyd (full name George Innes Llewelyn Lloyd, 24 December 1925 - 23 August 1991) was producer for Doctor Who from the latter part of William Hartnell's tenure as the First Doctor to the middle of Patrick Troughton's second season. As a producer, he reached the front rank of BBC television drama. He began his television career working on popular series in the 1960s. He was the third producer on Doctor Who. His tenure ran for two seasons, from The Celestial Toymaker through The Enemy of the World (excepting The Tomb of the Cybermen, which was produced by Lloyd's successor Peter Bryant on a trial basis). His most important contribution to the programme was developing the notion of regeneration to replace the lead actor. This arose following continuing health difficulties for William Hartnell.