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.

Cassie is back with a vengeance, taking her work to the next level. Iris’ secrecy around the project puts a dent in her relationship with Hiram and their collaboration around…

Having lost all sense of perspective, Iris confides in Christophe, who, in turn, opens up a part of his world. Little does Iris know the encounter will leave her shaken…

A London rideshare driver ignites an international crisis when he kidnaps a worker from a social media company.