High Quality Content by WIKIPEDIA articles! Nebulous is a British comedy-sci-fi broadcast on BBC Radio 4, starring Mark Gatiss as the title character, and also starring and written by Graham Duff. Set in 2099 AD, the series covers the work Professor Nebulous, head of K.E.N.T. (The Key Environmental Non-Judgmental Taskforce), an organisation designed to solve the problems the Earth`s ruined environment.