Jack Halford’s behaviour - secret calls, personal appointments and an obsession over an outstanding case - is causing the team some concern. But nothing can prepare them for the bombshell he’s about to drop. Halford is quitting UCOS (probably because he doesn't like how the writers are making the show more procedural in nature…) But any thoughts that Pullman, Lane and Standing have about probing his motives and persuading him to change his mind are sidelined by the arrival of shadowy Whitehall Intelligence figure Stephen Fisher...