Incarnation:

Twelfth Doctor

Companions:

- Clara Oswald
- Bill Potts
- Nardole

Miscellaneous:

- First incarnation of the new regeneration cycle granted by the Time Lords
- Often blunt, insensitive, old & calculating when needed
- Despite his ruthless exterior, he was actually deeply caring & empathetic
- Exploited his vast intelligence & experiences without a fear of hiding his age
- Subconsciously chose Caecilius ' face to remind himself to always save people
- Known to go long periods of time in one location

Regeneration:

Electrocuted by a CyberMondan