Graham Norton (in-universe)

Graham Norton appeared on a radio broadcast on 5 March 2005. (PROSE: Rose)

Information from invalid sources
While the Eleventh Doctor was trying to drop off Dermot O'Leary at the National Television Awards in 2011, he accidentally overshot by a year. They saw Graham on the viewscreen. He was preparing to present the news, but was confused by the sudden arrival of the TARDIS in his studio. (NOTVALID: Dermot and the Doctor)

He later regenerated into the Tenth Doctor and the Eleventh Doctor for no apparent reason. (NOTVALID: Norton's Regeneration)

He later met the Twelfth Doctor at Sprout Boy's BBC Christmas party. (NOTVALID: Sprout Boy meets a Galaxy of Stars)

He was later contacted at the same time as the Twelfth Doctor when Eddie Redmayne was in search of Pudsey. (NOTVALID: Looking for Pudsey)