People who haven't seen any Third Doctor eps will be like "oh Twelve is a mean Doctor, Nine is a mean Doctor" you fools you know NOTHING. Nine is sometimes cruel in moments when he is under intense stress but Three is out here being a dick to people purely because its a Tuesday. He's called the Master an unimaginative plodder, Jo a bun vendor, and the Brigadier an idiot and it's only 10AM. The Brigadier is Doing His Best™ to cope with an invasion of earth and Three is there like "wow, now you've come up with such a brilliant plan, how about you actually go do it and quit bothering me". The Master is like "i admire the Doctor in many ways, he is a brilliant adversary" and Three is like 'the Master is an idiot who couldn't find his own asshole with a map'. He's sarcastic he's caustic he's fresh out of fucks to give and completely convinced that he's the smartest in the room, and he's confidently saying, without a hint of self-awarness or irony, that vanity is the Master's weakness. All this is intended as a compliment btw I love him.
(And it gets even better bc just as the Doctor is saying vanity is the Master's weakness, while hopping around on one foot cursing bc he got frustrated and kicked the tardis, the Master, who has happily stuck his fingers into every live socket ever invented, is calling curiosity the Doctor's weakness. No one is coming out of this with any dignity left).
