Possible future
Speaking during the English Civil War, the Second Doctor admitted to Polly Wright that he had seen or heard of "all kinds of" possible futures from the "great" to "truly terrible", which were "all out there". He acknowledged Englands with a third, fourth, or fifth Civil War, a resurgent monarch who ruthlessly oppressed all democracy, a triumphalist, hereditary Puritan Protectorate that ruled the country until the 20th century, or an invading Catholic army which took advantage of England's crisis to take over most of the known world. (PROSE: The Roundheads) Similarly, the First Doctor warned Steven Taylor that even saving the life of a child in the 1240 siege of Kiev could change history into a future where Adolf Hitler did not lose the Second World War and an atomic war consumed most of Asia. (PROSE: Bunker Soldiers)
The "latest temporal projections" before the Genesis Incident (PROSE: Doctor Who and the Genesis of the Daleks) showed a future where the Daleks had succeeded in wiping out all other living beings across the universe. (TV: Genesis of the Daleks) During the Last Great Time War, the Time Lords used the Matrix to project encounters between the Doctor and the Daleks in the post-Time War universe, which they then believed were only "theoretical". (PROSE: Dalek Combat Training Manual)
The Eleventh Doctor and Clara Oswald came into contact with what the former identified as a possible future, which was ultimately averted. (TV: Journey to the Centre of the TARDIS) The Twelfth Doctor told Clara that their encounter with his ghost was not a potential future as they had just experienced it. (TV: Before the Flood) Conversely, the Thirteenth Doctor told her companions that Orphan 55 was only a "possible future" for the Earth of 2020. (TV: Orphan 55)
Whilst exposed after being victim of a time ram, the heart of the Master's TARDIS showed the Master some of his possible futures. In one the Master was horribly deformed, being cared for in a Zero Room on Gallifrey after being rescued by Chancellor Goth. In another the Master had achieved his aim of conquest, but now possessed an entirely alien body. (AUDIO: The Threshold)
