We learn that Lamb looks after Standish because of his guilt at his own involvement in Partners death.
During dinner, their friend Leo arrives, but River recognises him as Chernitsky.
Lamb later finds the oligarch Nevsky is dead of an apparent radioactive poisoning.
Newcomer Longridge takes Mins place in the security operation.
Spider survives, but his future in MI5 looks shaky at best.
With no hope left, Katinsky then shoots himself.
Slow Horses series three is streaming weekly onApple TV+
