The Slow Horses season 6 finale is available now , with a shocking ending that is explained by new showrunner Gaby Chiappe in an interview. Plus, Apple has debuted the first trailer for season 7.

Here’s what happened in that surprise Slow Horses finale ending, plus the new trailer for season 7

If you haven’t yet watched the Slow Horses season 6 finale , stop reading here.

**major spoilers ahead**

Slow Horses was marked this season by a high number of character deaths.

That continued in the finale that just aired with the death of Emma Flyte at the hands of River’s father, Frank Harkness.

But in the final moments of the episode, there’s another character who seemingly dies too, and in far more shocking fashion: River Cartwright.

It’s not entirely clear what caused the death, though.…