Bradley played Solomon, a ruthless buccaneer, in the 2012 "Doctor Who" episode "Dinosaurs on a Spaceship". He previously provided voice work for "The Sarah Jane Adventures" serial "Death of the Doctor". It was announced in January 2013, that Bradley had been cast as actor William Hartnell in "An Adventure in Space and Time", a BBC docudrama about the creation of "Doctor Who" in 1963. The special aired in November 2013, adding to the buildup to the 50th anniversary episode of "Doctor Who" later that month.