Fifteenth Doctor

The Fifteenth Doctor was the Fourteenth Doctor's successor.

A day to come
to be added

A new body
After an adventure involving "Ruby S", (PROSE: ) the Doctor decided that the attire of his previous incarnation "[wouldn't] do", choosing his new clothing in the TARDIS, sturdy boots and a new hat being amongst the items chosen. (POEM: ) He also wrote in his diary about his adventure, quoting himself saying "what the h[...] here?" (PROSE: )

Further adventures
to be added

Other realities
In the Daft Dimension, Ncuti Gatwa was on the cover of an issue of Doctor Who Magazine. (COMIC: )

Appearance
The Doctor had a "nice" new face which fitted well into place, with his hair being short and his nose being just right. His legs were firm and his eyes were bright.

Wearing the clothes of their predecessor for a short time and believing them to be "off-the-peg", the Doctor first pondered on wearing a frilly shirt and a scarf before deciding they were "over them" and "a touch too soon" respectively. The Doctor finally chose some sturdy boots, believing them to be handy for the Moon and a "nice" new hat. (POEM: )

Behind the scenes

 * Interestingly, the Fifteenth Doctor's first appearance was implicitly in the 2017 poem Contents, wherein an incarnation of the Doctor following the Thirteenth Doctor rummaged through a chest looking for a new costume; as revealed on the Official Doctor Who Twitter account, the Fifteenth Doctor does indeed wear a stetson and boots.
 * His second appearance was also implicitly in the audio drama The World Tree, which, while ambiguous as to which future Doctor appeared in it, Nick Slawicz, the story's author, confirmed that the Fifteenth Doctor was indeed the Doctor present in that story.