Season 4
In season 4, a bombing detonates personal secrets, rocking Slough House's already unstable foundations.
Episodes
Identity Theft
A London bombing puts Taverner under pressure. When River grows concerned for his grandfather, Louisa encourages him to go for a visit.
A Stranger Comes to Town
A naive agent makes a discovery about the Westacres bomber. Lamb suspects that David knows more than he's letting on.
Penny for Your Thoughts
River is trapped in France. Back at Slough House, the Dogs have come for Lamb.
Returns
Taverner is desperate to hide dangerous secrets. River seeks answers at his grandfather's house.
Grave Danger
Lamb questions David about France as River comes face to face with the enemy.
Hello Goodbye
Impossible decisions are faced and sacrifices are made.