Fifteenth Doctor

The Doctor
The Fifteenth Doctor
Doctor Who character
A man smiling at the camera. He is wearing a leather coat and is in a room with harsh purple lighting.
Ncuti Gatwa as the Fifteenth Doctor
First regular appearance"The Church on Ruby Road" (2023)
Last regular appearance"The Reality War" (2025)
Introduced byRussell T Davies
Portrayed byNcuti Gatwa
Preceded byDavid Tennant (Fourteenth Doctor)
Information
Tenure25 December 2023 – 31 May 2025
No of series2
Appearances16 stories (18 episodes)
Companions
Chronology

The Fifteenth Doctor is an incarnation of the Doctor, the protagonist of the British science fiction television series Doctor Who. Within the series' narrative, the Doctor is a millennia-old alien Time Lord from the planet Gallifrey, with somewhat unknown origins, who travels in time and space in their TARDIS, frequently with companions. Usually, at the end of each incarnation's life, the Doctor regenerates; as a result, both their physical appearance and personality change. However, the Fifteenth Doctor emerged unconventionally, via "bi-generation", in which he split from the body of his predecessor, the Fourteenth Doctor (David Tennant), rather than replacing him, allowing both incarnations to co-exist. The Fifteenth Doctor is portrayed by Ncuti Gatwa, who is the first black man and the first openly queer actor to portray the role. Gatwa portrayed the character in the fourteenth and fifteenth series of the show's 2005 revival.

The Fifteenth Doctor has been characterised as more emotionally open than many previous incarnations. Throughout the Fifteenth Doctor's time on the show, he travels with companions Ruby Sunday (Millie Gibson) and Belinda Chandra (Varada Sethu) while they face off against various antagonists, including a recurring Pantheon of Gods and their leader, Sutekh (Gabriel Woolf), as well as renegade Time Lord the Rani (Anita Dobson and Archie Panjabi) and the banished Time Lord founder Omega (Nicholas Briggs). He also engages in a romantic relationship with the character Rogue (Jonathan Groff), marking the first time in the series the Doctor has engaged in a romantic relationship with another man. After triggering his regeneration to alter reality and bring back a child he had in a fantasy world created by the Rani, the Fifteenth Doctor regenerates into a character portrayed by Billie Piper.

Gatwa was cast in the role after telling his agent that he wanted to play the Doctor. His agent subsequently notified him that the production team of Doctor Who wanted him to audition for the part. He was the last actor auditioned for the role, and was cast soon after. Gatwa was given creative freedom with the Fifteenth Doctor's character, resulting in him researching past stories to decide how he wanted to portray his incarnation. Unlike those of prior incarnations, the character's costumes varied between stories, changing in each one, which was done to not only represent more aspects of British culture, but also so that fans could cosplay any number of looks rather than a particular one.

Gatwa left the role in 2025, with his character regenerating without any prior announcement. Gatwa said his departure was "always the plan", though statements from other actors fuelled beliefs that his departure from the role was not originally planned. Critics praised Gatwa's performance as the character, particularly in scenes from "Rogue" and "Dot and Bubble" (both 2024). However, some critics criticised the character's handling within the show. They felt his introduction hampered his character growth, that his departure was not executed well, and that Gatwa was not given enough time in the role.