Twelfth Doctor

The Twelfth Doctor will be the twelfth incarnation of the renegade Time Lord known as the Doctor.

Foreshadowing
The Sixth Doctor learned from the Master that the entity known as the Valeyard was created during the Doctor's twelfth regeneration. (DW: The Ultimate Foe)

When the Eleventh Doctor had the Teselecta fake his death, including an illusion of a failed regenergtion, River informeded Amy Pond that the Eleventh Doctor would have been dead the moment the process started, his failer to reach his twelfth incarnation is what killed the Doctor. (DW: The Impossible Astronaut)

Undated/unchronicled events

 * The Twelfth Doctor attended the funeral of Alistair Gordon Lethbridge-Stewart. (ST: The Gift)