The Valeyard

The Valeyard was an extrapolation of the Doctor's darkest side, created by the Rogue during the Twelfth Doctor's Regeneration Cycle.

Biography
To be added.

Season 23

 * The Trial of a Time Lord
 * The Mysterious Planet
 * Mindwarp
 * Terror of the Vervoids
 * The Ultimate Foe

Season 47

 * The First Game

Christmas Special 2010

 * Hark! The Weeping Angels Sing

Season 48

 * Checkmate

Series 3

 * Vengeance, Part II

Movies

 * Doctor Who: Vengeance
 * Doctor Who: Endgame