 Various former "Doctor Who" alumni had moved on to produce their own acclaimed genre programmes as well.The series' former scientific adviser Dr Kit Pedler and former script editor Gerry Davis collaborated to create "Doomwatch" (1970–72), a series which recounted the story of a governmental scientific group formed to investigate and combat ecological and scientific threats to humankind.In the "Quatermass" tradition of allegorical storytelling (Nigel Kneale was invited, but declined to contribute scripts to the programme), it used its science-fiction basis to try to convey real warnings about the state of the world, as well as telling tense, dramatic stories and not being afraid of shocking its audience, such as in the killing off of popular lead character Toby Wren (played by Robert Powell).