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.

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

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.

A romantic relationship in Istanbul ends badly. Lamb hits the panic button when one of his Slow Horses fails to show up for work.

January 1975. Student nurse Heather Pearce dies during a training demonstration. Detective Chief Inspector Adam Dalgliesh is sent to investigate, accompanied by his partner DS Masterson. Pathologist Dr. Chopra confirms…

After Fallon’s death, Dalgliesh finds a library book in Fallon’s room and a letter in Pearce’s pigeonhole about a patient of Courtney-Briggs’ called Martin Dettinger, whose recent death on the…

Connell joins Marianne’s social circle but doesn’t fit in. He apologises for how he treated her; she reconsiders her relationship with her new boyfriend, Gareth.

Connell and Marianne are back together. Connell has gained confidence in college; giving presentations in class and getting good grades but is reluctant to show Marianne affection in front of…

Marianne and Connell are seeing other people and realise (too late) that their break-up was due to a misunderstanding.

Marianne, studying abroad, pursues an unhealthy relationship.

Marianne and Connell are back in Dublin and together as a couple. Life is calm and they are at ease with each other. Then Connell receives news that he has…

Months later, school has finished and Connell arrives at Trinity College, Dublin. He has found a room in a house-share and meets his new housemate Niall. Despite his efforts, he…

Marcella takes her driving test and goes on a date with her driving instructor Jon. She witnesses flatmate Caroline calling boyfriend Mark a filthy rat during sex and finds her…