Slow Horses

Slough House: the MI5 backwater where agents who've made unforgivable mistakes get sent to rot. Their boss, Jackson Lamb, is a drunk, a slob, and an irritant — and one of the sharpest minds in British intelligence. His slow horses always end up in the middle of the worst possible situations.

Gary Oldman's finest television work. A spy thriller that belongs in the same conversation as le Carré. Each season raises the bar on the one before it.