Incarnation:

Ninth Doctor

Companions:

- Rose Tyler
- Adam Mitchell
- Jack Harkness

Miscellaneous:

- Forgot that his previous incarnation saved his people;
- Believed his killed all Time Lords & Dalek
- Projected a jovial & friendly demeanor
- Initially reluctant to involve himself in events
- Encourage or inspire others into acts of heroism

Regeneration:

Absorbed the energies of the Time Vortex to save Rose's life