Sherwin succeeded Peter Bryant as producer of the programme in 1969, overseeing the production of The War Games and Spearhead from Space.
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On The Space Pirates Sherwin briefly resumed his old role as Dicks was busy writing The War Games.
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Dicks has credited Sherwin with the creation of the Time Lords, who were introduced in The War Games, scripted by Dicks and Malcolm Hulke.
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Sherwin was responsible for the idea of exiling the Doctor to Earth (which happens at the end of The Second Doctor's last story, The War Games), a decision he took in an attempt to improve falling viewing figures, reinvent the programme and bring more reality to Doctor Who by basing it more on The Quatermass Experiment.
Manning Sherwin | Butler Derrick | Derrick May | Derrick May (musician) | Sherwin-Williams | Derrick Thomas | Derrick Henry Lehmer | Derrick | Tom 'Diver' Derrick | Tom Derrick | Derrick Walker | Derrick Pumaren | Derrick Jensen | Derrick Gardner | Derrick Carter | Derrick Brown | Derrick Brooks | Edward Holbrook Derrick | Derrick (TV series) | Derrick Robins | Derrick Hodge | Derrick de Kerckhove | Derrick Bell | Derrick Bailey | Chris Derrick | Brian Sherwin | Tom 'Diver' Derrick Bridge | Thomas Derrick | Sherwin Vries | Seán Sherwin |
John was recommended to then Doctor Who producer Peter Bryant by another BBC producer, James Cellan Jones, who sent Bryant and his associate Derrick Sherwin photographs of her.