When in doubt, call in the military, shoot it with bullets, and glare disapprovingly at the Doctor.
Character Overview
If the Doctor is a wandering alien anarchist, then Brigadier Alistair Gordon Lethbridge-Stewart is his grumpy, moustachioed babysitter. Making his first proper bow in The Web of Fear (1968), the Brigadier went on to become one of Doctor Who’s most enduring characters — a fixture of the Third Doctor’s exile years, a regular thorn in the Doctor’s side, and the man who turned “shoot first, ask UNIT to clean up later” into a military strategy.
As head of UNIT (the United Nations Intelligence Taskforce — because “alien-busting paramilitary squad” doesn’t look good on a budget proposal), the Brigadier specialized in treating every alien encounter the same way: deploy soldiers, fire lots of rounds, then look surprised when the bullets bounce off. Cybermen? Shoot them. Silurians? Shoot them. Dinosaurs? Shoot them. The Doctor? Occasionally shoot him too, just to see if it helps.
What made the Brigadier so beloved was not just his military bluster but his straight-man foil to the Doctor’s eccentricity. Where the Doctor saw cosmic possibilities, the Brig saw paperwork, security risks, and another excuse to requisition a tank. The two bickered like an old married couple — the Doctor rolling his eyes at the Brig’s obsession with guns, and the Brig rolling his eyes at the Doctor’s obsession with, well, science. Yet beneath all the snark and moustache-twitching, there was genuine respect and loyalty. The Brig was often the Doctor’s anchor on Earth, the voice of reason in a sea of aliens, and the one man you wanted in charge when giant maggots came crawling down the motorway.
He wasn’t just a one-era wonder either. The Brigadier spanned Doctors like few others could: sparring with the Second, grounding the Third, putting up with the Fourth, reminiscing with the Fifth, cameo-ing with the Seventh, and even showing up in The Sarah Jane Adventures and modern Who, where his daughter, Kate Stewart, carried on the family tradition of “look polite while rolling your eyes at the Doctor.” And when the Brig finally passed away (off-screen), the Eleventh Doctor saluted him — one of the rare times the show managed to make fandom cry into their UNIT-issue teacups.
Of course, his “posthumous” career continued when the Twelfth Doctor ran into a Cyberman version of the Brigadier, lovingly dubbed “Cyber-Brig.” Because in Doctor Who, even death can’t keep a good moustache down.