Slow Horses Season 6 Episode 6, titled Judgement Day, was released on Apple TV on October 21. The final entry of the sixth season was action-packed, high-stakes, and concluded with the death of another beloved member.After discovering Natasha's tie-up with Damien Cantor in the Kazan Operation, Jackson Lamb suggested to Diana to make him a scapegoat. While Diana was ready to confess her wrongdoings to the Home Secretary, Lamb suggested an alternative, which not only wrapped up the Kazan operation but also secured Diana's job.According to The Cinemaholic, the Dogs released River after Sid Baker's escape in Slow Horses Season 6 Episode 5. The MI5 Agent reached Diana's safehouse to help his squad fight off Frank Harkness and his mercenaries, who were out for their blood.Here is the complete ending breakdown.Slow Horses Season 6 finale: Diana and Lamb team up to wrap up the Kazan operationA still from Season 6 (Image via Instagram/@jack.lowden)After refusing responsibility for the Kazan operation throughout Slow Horses Season 6, Diana finally accepted that she had to sacrifice her First Desk position to sort out the mess. However, after discovering Natasha's involvement in the operation, Lamb proposed an alternative. The Slough House leader suggested replacing Sid Baker with Damien Cantor. Making Cantor the scapegoat would put an end to Vasily's mission of killing Lamb's agents, and Diana would get to keep her job. Once Diana was on board, Lamb convinced Natasha to frame Cantor as a double agent who pretended to work for Russia only to fund an off-the-books operation, as this would earn her Vasily's praise.In the Slow Horses Season 6 finale, Cantor was delivered to Vasily as a replacement for Sid Baker. On the other hand, Diana sold out Peter Judd as the official mastermind behind the Kazan operation to the Home Secretary, securing her position as First Desk.The team loses another member in the Slow Horses Season 6 finaleA still from Season 6 (Image via Instagram/@jack.lowden)While Lamb managed to secure his agents against Cantor, Frank Harkness and his mercenaries were at Diana's safehouse, ready to execute the Agents. The Slow Horses, along with Reece, Emma Flyte and Moira, put up an impressive fight with Molotov cocktails, handguns and harpoons. The group was divided into two, each led by Emma and River. Emma's group, which consisted of Shirley, Reece and Roddy, planned to use the boats to escape the safehouse. However, after one of Frank's men targeted their hideout, Emma had no choice but to shoot him down. But during this encounter, her own magazine ran out, and Frank Harkness fatally shot her.In the Slow Horses Season 6 finale, Emma died, but she managed to take down Frank's men. In the end, Standish called for Lamb's help, who was on a plane with Cantor, to deliver him to Vasily. Lamb offered to release Cantor if he convinced Frank to back down. While Cantor asked Frank to back down, Lamb still went on with his plan, maintaining it was just a lie. Cantor was eventually handed over to the Russians and the agents were safe.Frank escapes in the Slow Horses Season 6 finaleWhile Frank backed down after Cantor's orders, Jane showed up, determined to fulfil her mission. When Jane caught up to River, Frank surprisingly saved his son by shooting the Russian assassin in the head. Once the chaos died down, Frank and River shared an awkward drink and a conversation, until Diana's MI5 backup arrived.River tried to stall Frank by holding a gun to his head in the Slow Horses Season 6 finale. But Frank called his bluff and escaped again.How did Slow Horses Season 6 end? View this post on Instagram Instagram PostIn the final moments, Lamb and the Agents gathered in a church to honour their fallen members. As the agents drank in Joe's memory, Standish delivered a message to River. One of his grandfather's neighbours noticed a light in the house had been turned on, suggesting Sid remembered her promise. In the previous episode of Slow Horses Season 6, Sid promised River to keep a light on for him, and this was his cue to return to his grandfather's house and meet up with her.River raced to his grandfather's house and noticed Sid from the window. While the shower ran in the background, River prepared a romantic setup for the couple. But the scene took a turn when River felt a twitch in his palm as he was constantly stretching it. A few moments later, River's pain worsened, and he eventually collapsed in the middle of the room, seemingly breathless.You can stream Season 6 of Slow Horses on Apple TV.For the latest scoops on your favorite TV shows and movies, follow SoapCentral.