‘Slow Horses’ season 6, episode 5 kills off another character in its cold open

Spoilers: Decider reports that Sid survives a car crash and an attempt by assassin Jim to drown her. River intervenes, and the two hold Jim underwater until he stops breathing. Jim had killed J.K. Coe in the previous episode. Kyle Soller, who plays Jim, told Decider the fight took a lot of stunt rehearsals.