Incarnation:

Fourth Doctor

Companions:

- Sarah Jane Smith
- Harry Sullivan
- Leela
- K9 - Romana I & II
- Adric
- Tegan Jovanka
- Nyssa of Traken

Miscellaneous:

- Wore a long, multi-colored scarf
- Often talked to himself
- Saw all sapient lifeforms as his "kith"
- Oddball humor, often played the fool
- Peace-loving & kind-hearted
- Reacted with explosive fury when provoked
- Often had jelly babies with him

Regeneration:

- Fell to the ground from a great height after battling the Master at the Pharos Project;
- Merged with the Watcher, a projection of himself