Perseus reaches its climax as Kieran prepares to catch Shakiel with a carload of automatic weapons. However, Spencer's killer Jermaine King has escaped from custody and kidnapped Ryan's sister Tia. Sarah has to free Tia and re-arrest King before he disrupts Perseus. The operation succeeds: Shakiel is arrested. Then a completely unexpected disruption occurs: Ryan sees Steve shaking hands with police officers. Suddenly there are two hostage situations: Kieran and Lizzie at Steve's flat where a furious Ryan holds Steve at gunpoint, and Sarah trying to rescue Tia from the desperate King. The scene is set for a breathtaking finale.