Virgin reality

A sequence in the Seventh Doctor's life, broadly spanning his fight with the Timewyrm to his visit to the House of Lungbarrow, crystallized a version of reality into existence, (PROSE: Deceit, Blood Heat, Falls the Shadow, So Vile a Sin, et al.) known by some as the Universe (PROSE:  Genesys,  Apocalypse, Deceit) or the real universe because it was the only normal universe in existence. (PROSE: Blood Heat, No Future, Falls the Shadow, Dead Romance) Due to the process of crystallized time, other attributes of this reality included a version of human history leading into the Earth Empire, (PROSE: Blood Heat, The Dimension Riders) the subsequent sequence of Bernice Summerfield's life on Dellah, (PROSE: Oh No It Isn't!, Ghost Devices, Dead Romance, et al.) and various other adventures of the Seventh Doctor's prior incarnations. (PROSE: The Crystal Bucephalus, The Well-Mannered War, A History of the Universe, et al.)

While the majority of sources indicated this reality was the same universe as the Doctor's universe as a whole, (PROSE: Vampire Science, Demontage, System Shock, Notre Dame du Temps, AUDIO: Enemy of the Daleks, The Prisoner's Dilemma, WC: Shadow of a Doubt, et al.) some indicated it was separate from other major strands of the Doctor's existence. (PROSE: The Eight Doctors, Interference - Book One, Dead Romance, Celestial Intervention - A Gallifreyan Noir, At Childhood's End, AUDIO: Auld Mortality, Signs and Wonders, et al.)

By some accounts, this sequence of the Doctor's life continued into a sequence of the Eighth Doctor's life beginning with his travels with Sam Jones, (PROSE: Vampire Science, The Scarlet Empress) which initiated a new version of reality. (PROSE: The Eight Doctors, Unnatural History) Similarly, the sequence of Bernice Summerfield's Dellah life segued into her time with the Braxiatel Collection in an altered reality. (AUDIO: Professor Bernice Summerfield and the Mirror Effect, The End of the World, et al.)

Behind the scenes

 * Early Big Finish Productions stories featuring Bernice Summerfield were branded as Side Steps into "Virgin territory".