The Slow Horses must disappear to avoid capture by MI5. Lamb and River head to The Park to outwit Taverner.

Louisa makes her move on Pashkin. Catherine makes moves of a different kind when she plays high-stakes chess with a sinister stranger.

Lamb orders his Slow Horses to walk into traps. River believes something alarming is heading toward London.

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

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

Taverner is desperate to hide dangerous secrets. River seeks answers at his grandfather's house.

Lamb questions David about France as River comes face to face with the enemy.