List of references to other DWU media in live-action BBC stories

References to the "expanded universe" of Doctor Who in televised stories can be few and far between, but over the years, writers have slipped in references to characters, places, and events which originated in media other than the main show. This behaviour became more common with the advent of the 2005 series of the show, with writers having lived through, and even participated in the writing of, the novels, comics, and audio stories of the 80s, 90s, and early 2000s.

Season 4

 * David Whitaker's The Evil of the Daleks marks the first televised appearance of the Dalek Emperor. Whitaker had previously co-written the first appearance of an emperor in COMIC: Invasion of the Daleks with fellow television writer Terry Nation for The Dalek Book.

Series 1

 * A London double decker bus resembling Iris Wildthyme's Celestial Omnibus, the Number 22 to Putney Common, is seen in the opening scenes of Rose.
 * The concept of a time war originated in the Doctor Who Magazine comic 4-D War, where Time Lords of the Dark Times fight in the Black Sun War. The concept would later become a major part of the War in Heaven of the BBC Eighth Doctor Adventures, before eventually finding its way onto television in the form of the Last Great Time War, initially mentioned in Rose. Lance Parkin, who was an author for the BBC Eighth Doctor Adventures line, discussed some of the development of this, and how it impacted the book line, and what the thought process was behind the scenes here.
 * In the Virgin New Adventures novel Lungbarrow, the Time Vortex is red when travelling forward in time, and blue when travelling backwards. This idea was used again from Series 1 to 4 of the new series.
 * Aliens of London sees a UNIT officer with the name FROST on her uniform. This is a reference to Muriel Frost, who first appeared in the 1990 Doctor Who Magazine comic, The Mark of Mandragora.
 * Dalek is Robert Shearman's adaptation of his 2003 audio drama Jubilee. This fact is referenced by the Jubilee Pizza boxes seen in the story.
 * Kronkburgers, first eaten by soldiers of an alternate Roman Empire in the Doctor Who Magazine comic, Doctor Who and the Iron Legion, were sold on Satellite Five in The Long Game.
 * In Boom Town, Rose Tyler recalls visiting Justicia, as she did in the BBC New Series Adventures novel, The Monsters Inside.
 * In Bad Wolf, the Anne Droid asked Rose a question about the planet Lucifer, which first appeared in the Virgin New Adventures novel, Lucifer Rising.

Series 2

 * The two-parter Rise of the Cybermen / The Age of Steel is loosely based on the audio story Spare Parts, with Marc Platt being thanked in the end credits of the story.

Series 3

 * Paul Cornell's two-parter, Human Nature / The Family of Blood, is an adaptation of his Virgin New Adventures novel, Human Nature.
 * Steven Moffat's Blink is an adaptation of the short story What I Did on My Christmas Holidays by Sally Sparrow, published two years earlier.

Series 4

 * The Butler Institute, originally from the Virgin New Adventures novel Cat's Cradle: Warhead, was mentioned in The Poison Sky.
 * Henrietta Goodheart from the novel Beautiful Chaos is mentioned as Netty, a member of the Silver Cloak, in The End of Time.

Series 5

 * The Lodger is an adaptation of the Doctor Who Magazine comic of the same name.
 * At the opening of the Pandorica in (the aptly named) The Pandorica Opens, the Alliance is mentioned as including Chelonians and Haemogoths. Chelonians originated in the Virgin New Adventures novel, The Highest Science, while the Haemogoths had been mentioned in the BBC New Series Adventures novel The Forgotten Army, published a few months prior.

Series 6

 * Professor Arthur Candy, who first appeared in Steven Moffat's Decalog 3: Consequences short story, Continuity Errors, appears again in Moffat's television story, Let's Kill Hitler. Furthermore, he meets River at Luna University, which was first mentioned in that story.

Series 7

 * The Brig's daughter, Kate Stewart, who first appeared in the 1995 home video Downtime, appears as a major recurring character in the series starting with The Power of Three.
 * Before regenerating in The Night of the Doctor, the Eighth Doctor recalls some of his audio-original companions, including Charley, C'rizz, Lucie Miller, Tamsin Drew, and Molly O'Sullivan.

Series 8

 * In Into the Dalek, Clara Oswald is a teacher of Class 1C. In the novelisation of The Edge of Destruction, Barbara Wright is also revealed to have taught Class 1C.
 * Abslom Daak, who first appeared in the Doctor Who Magazine comic, Abslom Daak... Dalek Killer, was seen in the memories of the cyborg Psi.

Series 10

 * When recalling the planets on which the Cybermen have originated in The Doctor Falls, the Twelfth Doctor mentions Marinus, which had been revealed as a Cyberman origin planet in the Doctor Who Magazine comic, The World Shapers.

Series 12

 * The Timeless Children suggests that the Founders of Gallifrey knowingly restricted Time Lord regeneration to a maximum of twelve renewals, an idea first made explicit in the audio story Zagreus (although it attributed the decision to Rassilon rather than Tecteun).

Torchwood

 * John Frobisher, from Children of Earth, was named after Sixth Doctor Doctor Who Magazine companion, Frobisher. (DWMSE 39)

The Sarah Jane Adventures

 * The Raxacoricofallapatorian villains of the story The Gift, the Blathereen, first appeared in the BBC New Series Adventures novel, The Monsters Inside.

Class

 * The Coal Hill School Roll of Honours Board includes the names A. Okehurst, J. Gibson, and D. Hatcher, who all died in the Telos Doctor Who novella, Time and Relative.

Mini-sodes

 * In Liberty Hall, Alistair Gordon Lethbridge-Stewart mentions being with the Doctor in Malebolgia in 2003 (which are references to the audio story Minuet in Hell), and he mentions Gordon and Kate Lethbridge-Stewart (who are characters from the independently produced Downtime).