John Crockett

John Crockett (31 January 1918-11 October 1986) directed the episode, "The Wall of Lies", the fourth episode of Marco Polo and the entire serial, The Aztecs.

He so enjoyed his experience on historical Doctor Who episodes that he submitted story ideas to story editor David Whitaker. Though it's unclear whether his suggestions prompted any production, many of his ideas were in fact produced — mostly during the Hartnell era.