Complex sentence: In 1986 he appeared in the Mindwarp "segment of" Doctor Whos "The Trial of a Time Lord" and in 1994 was one of the lead characters in the BBC comedy series "The High Life" as Captain Hilary Duff.
Split into simpler sentences: In 1986 he appeared in the "Doctor Who" serial "The Trial of a Time Lord" in the "Mindwarp" segment. He was one of the lead characters in the BBC TV comedy series "The High Life" playing Captain Hilary Duff.