While I quietly think that the last couple of seasons dipped a little in quality, there's still no doubt that Apple TV's Slow Horses is the single streaming show I look forward to most each year. For one thing, the fact that we get an annual season instead of waiting multiple years between outings is a huge boon.
Now, its sixth season is imminent, and we've finally got a proper trailer to hint at what's to come for River Cartwright (Jack Lowden) and the rest of the gang. As it happens, though, this is one of the most surprising trailers I've seen in years, and features a massive surprise that could feel like a big spoiler, right at the end – be warned!
