Apocalypse Slough sees Gemma achieve her dreams of becoming an official, ball busting, kick ass investigator at the Serious Crimes Agency (SCA), whilst Terry is denied the dream thanks to his colourful criminal history. With this new strain on their relationship, they're thrown in headfirst to crack a curious double murder at a local rugby club - whose members seem to have dark and disturbing secrets of their own. As Gemma leads them closer into the complex case, questions begin to arise about their partnership and the mysteries they uncover. If Gemma doesn't pick up the pace, it could be game over for everyone; her and Terry included!

Gemma and Terry will be spending their first Christmas together as a married couple and are once again thrown into the middle of a murderous catastrophe.

Over the course of various Santa parades, present giving events and competitive Christmas challenges things start to take a very dark turn. Gemma tries her best to salvage their Christmas as the bodies start piling up, but can Terry finish preparing the Christmas dinner of his dreams and solve the murders in time?

Terry's forced to reconnect with an old friend as Gemma investigates a suspicious gang.

Gemma and Terry must solve the murder of a wedding guest before they can say ‘I do'.

Gemma and Terry go undercover at a therapy retreat to chase mysterious death threats.