People
Companions
Rose Tyler
Captain Jack Harkness
Sarah-Jane Smith
Adric
K-9
Tegan Jovanka
Nyssa of Traken
Ace
Turlough
Romana I
Romana II
UNIT (United Nations Intelligence Taskforce)
(Apparently you can't use the full title - I've read that Russell T Davies has said in the new DWM that the United Nations don't want to be associated with it!!!)
Brigadier Alastair Gordon Lethbridge-Stewart
Captain Mike Yates
Sergeant Benton
Surgeon Lieutenant Harry Sullivan - Travelled with the Doctor and Sarah Jane Smith in the TARDIS
Elizabeth "Liz" Shaw - the Doctor's replacement as UNIT's scientific advisor. She became his assistant when he returned to Earth.
Jo Grant - her uncle used his influence to assign her to UNIT
"Famous" TARDIS Travelers
Adversaries
The Master (see Master write up under Time Lords)
The Rani
