I might as well say it. @twilightstreets ' forthcoming 12th Doctor novel Big Bang Generation features Prof. Bernice Summerfield!— Paul_Cornell (@Paul_Cornell) August 26, 2015
With Big Finish mixing new Who characters with their own and some old favourites (can you believe this now exists?) comes a further example of Doctor Who's "expanded universe" coming into contact with the revival. To save you a click, @twilightstreets is Who legend Gary Russell, who has form on this. When we was an editor on the Doctor Who Adventures strip way back when, Mephistopheles Arkadian from the Gallifrey audios made a cameo in one of the Tenth Doctor strips and with a plot point which eventually played out at Big Finish. Expect a sarcastic line from Clara about "What is it with you and archaeologists". Your move, Iris.