Olivia Cooke Talks Sidonie Baker’s Surprise ‘Slow Horses’ Comeback and Finale Cliffhanger
Olivia Cooke spoke about reprising her role as MI5 agent Sidonie Baker in the Season 6 finale of 'Slow Horses.' The character, believed dead since Season 1, makes a surprising return. Cooke also discussed on-set injuries and said she wants a future showdown.
Olivia Cooke reappears as MI5 operative Sidonie Baker in the sixth-season finale of Apple TV’s Slow Horses, titled “Judgement Day.” The character had been absent since Season 1, when a head wound made River Cartwright, played by Jack Lowden, believe she had died. The finale’s closing moment reveals she is alive and addresses River directly.
Cooke also discussed injuries sustained during production and expressed interest in a later confrontation for her character. The article notes the episode is now streaming and frames Baker’s return as a major twist in the spy series.
The return of a presumed-dead character could energize Slow Horses fans and fuel online speculation about future seasons, especially among viewers who follow serialized spy dramas. It may also reinforce streaming platforms’ reliance on cliffhangers to sustain weekly discussion and subscriber attention. For actors and production teams, Cooke’s comments about injuries may prompt more visible conversation about on-set safety, though the article does not establish broader industry effects.