Twelfth Doctor

The Twelfth Doctor was a version of the Doctor who existed in multiple universes — an older man with a habit of writing on chalkboards.

Jenny Everywhere once scrawled “Ace Rules OK!” on the TARDIS of the Third Universe's Twelfth Doctor, confusing both him and his companion Clara Oswald. (PROSE: Ace Rules OK!)

When Wednesday Addams entered the Eleventh Doctor's TARDIS in one universe, she had psychic visions of some his other selves, including one who was writing on a chalkboard as well as his successor, a blonde woman. (PROSE: Wednesday and the Doctor)

Incarnations of the Twelfth Doctor
Third Universe • Wednesday and the Doctor

Doctor Who-related concepts in Jenny Everywhere media

Individuals Ace • Andro • Auteur • Bibendum • The Brigadier • Peri Brown • Ian Chesterton • Chris Cwej • Davros • Dionus • The Doctor (Timeless Child • First Doctor • Second Doctor • Fourth Doctor • Sixth Doctor • Nth Doctor • Seventh Doctor • Eighth Doctor • Lily Savage Doctor • Ninth Doctor • Tenth Doctor • Eleventh Doctor • Twelfth Doctor • Thirteenth Doctor • The Female Doctor • Fourteenth Doctor • Fifteenth Doctor • Judi Dench Doctor) • The Doctor's TARDIS • The Enemy • Fabian • Jenny Flint • Janis Goblin • Goblin King • The Great Intelligence • Susan Foreman • Jenny • The Man in Black • Missy • Godfather Morlock • The Noodle Man • Alice Obiefune • Clara Oswald (Gallifreyan splinter) • Bill Potts • Rassilon • Sarah-Jane Smith • Strax • Bernice Summerfield • Ruby Sunday • Susit • Tecteun • The Toymaker • Puff Tremayne • Rose Tyler • Vastra • Barbara Wright Species Dalek • Goblin • Menoptera • Pingui • Shobogan • Sontaran • TARDIS (Type 40 • Type 44) • Time Lord • Vampire • Weeping Angel • Zarbi • Zygon (Sygon) Organisations Chancellery Guard of Gallifrey • Gallifreyan Chapters • Great Houses • Faction Paradox • Magpie Electricals • Slitheen • UNIT ("Intelligence Taskforce") • The Toymaker's legions Locations 13 Paternoster Row • The Academy • Constellation of Kasterborous • Dronid • Gallifrey • The Old Workshops • Pete's World • Snowy planet • Third Universe • UNIT tower • The Vault Items Gevity (Generic Energy Drink™ • Fezity) • Mega sonic death ray • Psychic paper • Sonic screwdriver • Time-Space Visualiser Media The Curse of Fatal Death • The Daleks (Genesis of Evil) • Doctor Who (unnamed episode) • Doctor Who and the Completely Idiotic and Definitely Non-Canonical Attempt to Write... • Doctor Who Discord server • Faction Paradox (Alien Bodies • The Book of the War) • The Infinity Rassilons • Jenny Says: Drink Gevity™! • The Noodle Incident • Nuke a Freaky Roblox City feat. Fezity™ • Tardis Wiki • TV Century 21 (issue #1) • Unnamed Fezity comic Cast & crew Colin Baker • Tom Baker • Cookieboy 2005 • Judi Dench • William Hartnell • Lance Parkin (Percival Lankin) • Joanna Lumley • Paul Magrs • Sylvester McCoy • Lawrence Miles • Steven Moffat • Terry Nation • Jon Pertwee • Plum Pudding • Lily Savage • David Tennant Other Artron energy • Bad Wolf • Clearance level 1 • Complicated space-time event • The Goblin Song • Great Cosmic War ("Last Great Cosmic Time War in Heaven") • Junior Time Technician • Regeneration • Sutekh's dust of death • Time Technician • The Unravel • Valeyard • War in Heaven ("Last Great Cosmic Time War in Heaven")