This is an revised version of a post I made a year ago that now includes all the Time Lord characters that were introduced in 2013 as well as a few I missed the first time around.
The Doctor (An Unearthly Child - The Snowmen)
A mad man with a box. You may have heard of him.
Susan (An Unearthly Child - The Five Doctors)
The Doctor’s granddaughter. The unearthly child. Big fan of John Smith and the Common Men.
The Meddling Monk (The Time Meddler, The Dalek’s Masterplan)
The first in a long line of villainous rogue Time Lords, although he is more mischievous than out and out evil.
The War Chief (The War Games)
A prototype Master with some Seneca Crane-style sideburns.
Time Lord Judges (The War Games)
Lacking anything even remotely resembling a sense of humour, this trio oversaw the Doctor’s trial and exiled him to Earth.
The Master (Terror of the Autons - The End of Time)
The Doctor’s nemesis, the top dog amongst evil rogue Time Lords, and owner of one of the most magnificent beards in the universe.
Banker Time Lord (Terror of the Autons)
Warned the Doctor about the Master being of Earth. The Doctor thought his outfit looked ridiculous. Ha, he’s one to talk.
Bad 70s Hair Time Lords (Colony in Space)
They don’t do much except tell us that the Master is up to something and take part in a small ‘Who Has the Worst Haircut’ contest.
Omega (The Three Doctors, Arc of Infinity)
A great intergalactic engineer and one of the co-founders of Time Lord society. Got himself trapped in an anti-matter universe and lost his head. Literally. Despite being defeated by the Doctor(s), he showed up years later hiding out in Amsterdam. Purely for evil purposes, though. Nothing at all to do with the legal drugs. Honest.
Ooooh. Here’s a useful post:
All the named Time Lords in Classic Who (and a few from New Who) compiled in one place for easy reference.