‘Slow Horses’ Director on Season 6 and That Final Jack Lowden Scene: ‘We Had Two Endings and One of Them Was Happy’

SPOILER ALERT: This article contains major spoilers for “Slow Horses” Season 6, which had its season finale on Wednesday. “Slow Horses” Season 6 ended with lots of bangs and a whimper, as a key character appeared to take his last breath. First the body count: over the course of the season the Slough…