The Twelfth Doctor


 * “Never be cruel, never be cowardly. And never ever eat pears! Remember hate is always foolish and love, is always wise. Always try, to be nice and never fail to be kind.”
 * — The Twelfth Doctor giving word’s of advice to his next incarnation.
 * — The Twelfth Doctor giving word’s of advice to his next incarnation.

Stern, ruthless, but also kind and forgiving, the Twelfth Doctor was the first incarnation of the Doctor's second regeneration cycle, bestowed upon him by the Time Lords at Clara Oswald's urging.

Assured of the survival of Gallifrey, the Doctor was no longer chained down by guilt, becoming a less amiable character, as he no longer needed to cover the pain of what he thought was the extinction of the Time Lords, with a withdrawn attitude who habitually questioned his own goodness. He often dispensed with niceties in a tense situation, becoming cold and calculative when needed. However, despite his ruthless exterior, the Doctor was actually deeply caring and empathetic, always striving to help others for the sake of being kind.

It was not until his first battle with Missy that the Doctor resolved his morality crisis, realising he was simply "an idiot with a box and screwdriver" who went around helping others. Following this, the Doctor began to show his lighter side more clearly and forged a closer bond with Clara. After her death, he spent four and a half billion years in his confession dial to reach Gallifrey due to Rassilon's concern with the Hybrid. Seeking revenge, the Doctor broke his own moral codes and unleashed his wrath upon the Time Lords in an ultimately futile attempt to save Clara, losing his memories of her as a price for his reckless actions.

After a final reunion with River Song, the Doctor was charged with guarding Missy in a vault at St Luke's University with Nardole. Sometime into this role, he began tutoring Bill Potts, who soon became his travelling companion, with Nardole joining them after an invasion by Monks. When testing Missy's rehabilitation resulted in Bill becoming a Cyberman, Missy leaving with the Master, and Nardole having to be left behind, the Doctor was mortally wounded in battle against the Cybermen.

Trying to halt the regenerative process after growing weary of constantly changing personas and losing companions, the Doctor crossed paths with his original incarnation and the Testimony, and was encouraged to regenerate by glass avatars of Bill and Nardole. Accepting his impending regeneration and his responsibility to life itself, the Doctor used his last moments to give his successor some words of advice, willingly accepting to carry on being the Doctor before finishing his regeneration into a female body.

2013 Specials

 * The Day of the Doctor
 * The Time of the Doctor

Series 8

 * Deep Breath
 * Into the Dalek
 * Robot of Sherwood
 * Listen
 * Time Heist
 * The Caretaker
 * Kill the Moon
 * Mummy on the Orient Express
 * Flatline
 * In the Forest of the Night
 * Dark Water
 * Death in Heaven

Mini Episode’s

 * Prologue
 * The Doctor's Meditation

Series 9

 * Last Christmas
 * The Magician's Apprentice
 * The Witch's Familiar
 * Under the Lake
 * Before the Flood
 * The Girl Who Died
 * The Woman Who Lived
 * The Zygon Invasion
 * The Zygon Inversion
 * Sleep No More
 * Face the Raven
 * Heaven Sent
 * Hell Bent
 * The Husbands of River Song

Class Series 1

 * For Tonight We Might Die

Series 10

 * The Return of Doctor Mysterio
 * The Pilot
 * Smile
 * Thin Ice
 * Knock Knock
 * Oxygen
 * Extremis
 * The Pyramid at the End of the World
 * The Lie of the Land
 * Empress of Mars
 * The Eaters of Light
 * World Enough and Time
 * The Doctor Falls
 * Twice Upon a Time