River gets cozy in the Cotswolds while searching for a sleeper agent. Min discovers Russian drinking games are the most brutal of all.

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

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

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

Impossible decisions are faced and sacrifices are made.