In , the fourth novel in Mick Herron’s series of spy novels, he describes London as “a class-A city ...

except for the parts that weren’t, which were like someone had taken all the worst bits of everywhere else and shored them up against each other. And the traffic was a f*****g nightmare.” That’s as good an introduction as any to the bleak, depressing, post-Brexit metropolis wherein MI5’s ragtag B-team once again fling themselves up against yet another catastrophe that’s well above their pay grade.

This time around, that mystery entails the so-called Slow Horses of Slough House working to figure out who detonated a bomb in the middle of a busy London shopping center, killing scores of people — and it’s this installment in Herron’s series that also serves as the basis for the fourth season of , critically acclaimed that returns . “We’re all targets, just like old times,” Gary Oldman’s slovenly, misanthropic, and deceptively brilliant spymaster Jackson Lamb opines at one point during the new season, the first trailer for which Apple released today (below). Lamb is the spook who leads an outpost of washed-up spies who’ve all committed nearly career-ending mistakes of one sort or another.

When asked whether he’s in charge of the agency’s “rejects,” Lamb dismisses the question in a huff with: “They don’t like being called that.” Sign up for the most interesting tech & entertainment news out there. By signing up, I agree to the and have .