Taverner and Tearney face off for control of MI5. River and Louisa find themselves caught in the crossfire.

The Slow Horses fight for their lives. Lamb shares some devastating truths with Catherine.

Marcus and Shirley face Lamb’s wrath. River discovers revenge is a dish best served cold.

Tearney makes a bold move. The Slow Horses assist the Tiger Team, unaware of their hidden agenda. Lamb and Ho take a road trip.

As the show goes on, fragments of memories collide with the present and future.

Rue pursues a new business venture, Cassie settles into a routine, and Cal finds a target.

Art imitates life as the East Highland crew watches their complicated dynamics reflected in Lexi’s long-awaited play. Meanwhile, Fezco gets ready to attend.

Rue gets depressed and watches 22 straight episodes of a British reality show.​ Jules goes to visit an old friend. Cassie looks for advice in the aftermath of Halloween night.

As the semester kicks off, Jules questions Rue and Elliot’s new friendship. While Cal hunts for answers, Nate makes a tough decision. The lines between fantasy and reality begin to…

Kelly gets trapped in the body of Jen, a coma victim, and the gang has to save her.

Kelly gets trapped in the body of Jen, a coma victim, and the gang has to save her.