John Leslie "Gerard" Glaister DFC (21 December 1915 – 5 February 2005) was a British television producer and director best known for his work with the BBC. Amongst his most notable successes as a producer were Colditz, The Brothers, Secret Army and Howards' Way. Glaister's success ended with the 1991 series Trainer, which was moved from prime time to a weeknight slot because of its perceived failure. However, it sold well overseas. Glaister was married three times and had three daughters, two from his final marriage, to Joan.