The actor Louis Mahoney died at the end of June. He was 81. He was known to Doctor Who fans for two stories of the classic era – Season 10’s Frontier in Space and Season 13’s Planet of Evil – and one of the seminal stories of the modern era: Series 3’s Blink. But Doctor Whowas just a small part of the man’s career. He was one of the first black actors to appear with the Royal Shakespeare Company…