Classic Who S23 • Serial 4 · (2 episodes) The Ultimate Foe Sets: Doctor Who (1963-1996) Sixth Doctor 66% 1,054 votes Watch on iPlayer Watch on BritBox Novelisation: "Doctor Who: The Ultimate Foe" TARDIS Wiki Share this page {{ shareFeedback }} Copy link {{ copyFeedback }} Overview Reviews Transcript Quotes Quotes Spoiler warning! “There's nothing you can do to prevent the catharsis of spurious morality.” — The Valeyard, The Ultimate Foe Login to track and rate! Signal Strength: 50% What's this? Characters & Enemies Sixth Doctor Melanie Bush Darkel Sabalom Glitz The Valeyard The Tremas Master Also featuring: Sabalom Glitz Related Stories: The Brink of Death Millennial Rites Other adaptations of this story: Doctor Who: The Ultimate Foe Available in: The Trial of a Time Lord DVD Average. Rating: 62% The Collection – Season 23 Blu-Ray Average. Rating: 64%