A naïve agent makes a discovery about the Westacres bomber. Lamb suspects that David knows more than he's letting on.

Slow Horses Season 4 Episodes...

• s04e01 - Identity Theft
• s04e02 - A Stranger Comes to Town
• s04e03 - Penny for Your Thoughts
• s04e04 - Returns
• s04e05 - Grave Danger
• s04e06 - Hello Goodbye

Slow Horses Show Summary

After a botched and publicly embarrassing training mission, British MI5 agent River Cartwright is exiled to Slough House, an administrative purgatory for service rejects. Known as slow horses, Cartwright and his fellow employees must endure dull, paper pushing tasks and their miserable boss, Jackson Lamb, who expects them to quit out of boredom and frustration. Life in Slough House is defined by drudgery until the slow horses become entangled in a dangerous gambit by Regent's Park.