Doctor Who Unbound

Doctor Who Unbound was a series produced by Big Finish Productions. It featured hypothetical stories set in variants of the Doctor Who universe with premises fundamentally altered. These premises were often built upon "what if" propositions such as; "what if the Doctor hadn't left Gallifrey" (Auld Mortality), "what if the Doctor hadn't been UNIT's scientific advisor?" (Sympathy for the Devil) and "what if the Valeyard had won" (He Jests at Scars...). Others like Full Fathom Five's story was more vague built upon the idea of "what if the Doctor believed the ends justified the means?", while Deadline takes on the more meta-textual premise of "what if Doctor Who had never existed?" The final story in the ongoing series, Exile, featured a female Doctor, an idea that has been raised several times throughout Doctor Who's production.

First released in 2003 they were part of Big Finish's celebration of the 40th anniversary year of Doctor Who, two subsequent stories, sequels to stories released in the original run were release in later years. A Storm of Angels was released in 2005 was a sequel to the first in the series Auld Mortality. Masters of War was released in 2008 and was a sequel to Sympathy for the Devil.

Aside from the stories listed below, the term was used by Paul Cornell writer of Scream of the Shalka, to refer to its status with regard to continuity.