 In 1974, he played a leading role in the highly successful revue "Cole" at London's Mermaid Theatre.In 1985 he played sinister nuclear entrepreneur Jerry Grogan in "Edge of Darkness", the seminal BBC thriller series written by Troy Kennedy Martin, and had roles in the Clive Barker horror films "Hellraiser" (1987) and "Nightbreed" (1990).Nelson spent much of the later part of his career in small roles on television and in movies.