Naomi Wirthner

Defying Stagger’s direct orders, Kat continues to look into Dana’s case — and learns that she might not have known Josh as well as she thought she did.

Kat begs Stagger to help her extract a confession from LeBurne, and Stacey offers to look for Josh. Someone needing help from Kat arrives at the station.

Detective Kat Donovan is confronted with her past when she encounters the man she once loved — and learns some news about one she loathes.

Impossible decisions are faced and sacrifices are made.

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

River is trapped in France. Back at Slough House, the Dogs have come for Lamb.

Determined to track down Blunt and warn him about Yassen’s return, Alex unknowingly puts himself on a collision course with The Department, who are simultaneously hunting a dangerous cyber-terrorist.

Trying to put the memories of his deadly mission to Point Blanc behind him, Alex takes a holiday on the Cornish coast. But when an old foe resurfaces, Alex finds…

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

River has to steal something out of the Park to save a life. Lamb realizes a stranger game is afoot.

Knowing he can’t attack Cormac alone, Winston recruits a crew to overthrow the Continental.

Lamb and Katinsky go head-to-head. Ho finds himself trapped on a train with a Russian assassin. Season finale.

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

Jackson Lamb is on high alert after a former spy is found dead. Min and Louisa are tempted by an offer from outside Slough House.