In Berlin, the Good Shepherd Cybersecurity team are on a covert mission to extract information about Cyrus’s sinister intentions. Meanwhile, in Romania, a monstrous operation is silently getting into gear.

Who knows which way Mark will fall? His new permanent position will give him the chance to work from the ‘inside’, but there are signs he has a real conscience, that he cares about his colleagues. Fiona introduces him to newbie Charlotte and it’s obvious she wants the two of them to strike up a friendship. It’s pretty awkward. Mark has hopeless social skills.

Erica comes to Mark with a problem. She’s fallen prey to a ransomware attack and needs him to sort it without alerting their colleagues. Mark’s response shows he’s got her back. She owes him a favor now. The Controller threatens to deal with Erica and Mark has to create a web of lies to protect his Khromacom family.

Hacker Mark, aka 'Romulus', tail-gates his way right into the Khromacom corporate HQ where the IT Team are fire-fighting a cyber-attack. He secures a job on the IT security team, much to the satisfaction of his sinister handler, 'Mother'.

‘Romulus’ is ready to ship out of his fake life as Mark Shepherd. He’s just about to send the crucial upload of killer information to his masters when AJ stops him. It’s Red Nose Day and the Khromacom gang are ready for some shenanigans. He’s completely torn when his boss offers him a full-time contract.

AJ catches Mark trying to ‘phish’ Erica for financial information on the merger. Mark brushes this off as a phishing test for all the company. He asks AJ why he is so loyal to the company but AJ explains it’s about the people. Undeterred, later that night Mark downloads all Erica's confidential files.

Even before his first day Mark has been interrogating the social media accounts of his new colleagues. They seem like a fun and slightly random bunch of people who love to overshare. He’s tasked with getting security tightened while learning some useful info on the big merger.

Mark has a hunch that Erica will be targeted at a big finance conference, so he gets assigned as her security detail. To Mark’s shock and dismay, ‘Mother’ breaks cover. In the guise of an American businessman he charms Erica into divulging information despite Mark’s best efforts to protect her.

It’s 2am and Mark is disguised as a cleaner to target Erica’s office. Her desk and office walls are covered with papers that might be useful. He steals a notebook from her desk. Later the next morning he has a tricky conversation with her while trying to sneak it back in. ‘Mother’ piles on the pressure when Mark starts to ask awkward questions about the ‘sting’.

Mark is running into a brick wall on Khromacom’s network security so he calls on an old contact ‘Rat’ to dumpster dive for confidential documents people may have casually disposed of. When he returns to his desk he is shocked that the guys have made a surprise party. He’s completely thrown.

‘Mother’ or Maurice as we find his real name to be, is sure that he can keep the operation on the road. He uses Mark’s past to try to blackmail him. He tests the security guy’s sincerity in turning over a new leaf. Meanwhile AJ gets his big break and a new security star is born at Khromacom. Think all the loose ends are tied up? There’s always a twist in the best thrillers.

This adversary is relentless. Mark and AJ know that just because an attack has been thwarted, they will just keep coming. The information hacked from ‘Mother's' phone leads them to a USB key, surreptitiously handed to Erica by the American businessman. If she plugs it into her laptop the game is up, the confidential information about the merger will be extracted by ‘Mother’s’ terrifying masters.

Mark realizes he can’t do this on his own. He recruits AJ into the game. It’s risky but there’s no alternative. ‘Mother’ calls a clandestine meeting in a deserted underground car park. It looks like Mark’s plan will be thwarted when the Controller takes his phone. Is the countersting over before it gets started?

The morning after the attack, the team is trying to process what happened. A search through the security camera footage turns up some nasty surprises. Mark is shocked at what he sees and goes to confront the culprit; he feels betrayed and lied to. What seems like an ending is just another beginning. He wants to be master of his own destiny and take on his enemy, no matter what the consequence.

All is descending into chaos. The Good Shepherd Cybersecurity team is driven out of their office. Erica makes a devastating discovery about Maurice, while Mark receives more humiliation from the mastermind behind the 404. Everyone thinks he’s a hero, but he knows the awful truth and the enormous personal price he has paid.

Things are looking great for Mark. He’s got his dream job, working alongside his newly promoted buddy AJ. They do everything together. Episode 1 finds the Khromacom gang at a Karaoke bar. As ever there are security situations everywhere: unsecured phones being left out in public; people writing their passwords down. What else do you expect when people are having fun?

Mark and AJ are called into the team on a new top-secret project, e.v.e. They get to meet technology biz guru, Justin, and the tech brains behind him, Dev. Mark is tasked with setting up security on the mystery project, but the first meeting for the team sees some cracks appearing in their confidentiality protocols.

Mark and Charlotte’s dinner date is an opportunity for Mark to impress. While he’s a ‘wiz’ at all things security, that clearly doesn’t extend to the kitchen. Meanwhile ‘Aunt Margret’ is turning up the heat and Charlotte finds herself engaged in a hack battle with a skilled adversary. The consequences of earlier phone security errors play out in this tense and funny battle of wits.

At last the wraps are lifted from the top-secret project. Mark, AJ and the rest of the team are introduced to e.v.e – a virtual assistant like nothing we’ve seen before. Mark voices his concern to Dev about the security implications of having connected tech that can ‘hear’ everything that’s said in the office. Then Mark receives a message that threatens to raise the ghost of his previous life.

The new attack by Charlotte has set off some virtual alarms and AJ is helping their colleague Dawn to protect herself from a spoofing attack, after her phone was compromised. Meanwhile, Mark’s old hacker life threatens to come crashing back when he finds himself at a ‘Wellness Centre’ set up by his old controller ‘Maurice’. Surely it can’t just be about re-aligning some ‘chakras’?

Charlotte steps up her social engineering activity, manipulating fellow employees through vishing and impersonation. She’s an impressive adversary and even the security team are not immune. Mark finds himself teaming up with an unlikely ally to try to combat her and her controller, the mysterious ‘Aunt Margret’.

Mark and Charlotte finally make it to dinner at a ‘hipster’ restaurant. Mark’s counter-attack begins, giving Charlotte a taste of her own medicine; using 3rd party apps on her phone. In the process Mark discovers Charlotte’s true motives for targeting Khromacom. The surprises just keep on coming and Mark finds his loyalties tested to the limit.

The launch of e.v.e is just days away and the team is pulled into an unscheduled planning meeting. Dev is relying on Mark and AJ to keep the system secure against a threat of which only Mark knows the true scale. Finally, we start to see the real scope of e.v.e‘s capabilities. Never before has the maxim ‘trust no-one’ seemed more relevant

e.v.e’s launch day minus one and Charlotte is showing herself to be as skilful an actor as she is hacker. Maurice is forced to cash in some old favours, no matter how far flung, or how deep ‘undercover’, to find out who’s really behind the growing web of conspiracy. Meanwhile AJ is having doubts about his friendship with Mark, who seems worryingly distracted and evasive. Not surprising really, after a game-changing revelation that no-one saw coming.

It’s the day of the big launch. The excitement and the threat levels around e.v.e are through the roof. AJ and Mark take the team through the critical security protocols. Meanwhile Charlotte impersonates her way into a bedroom at the launch event hotel. So at last we come to the final showdown. Mark is going to have to draw on all his powers of persuasion to save Charlotte, but time is running out.

Finally, all of the secrets are laid bare, all of the webs of deceit unravel. The revelations come thick and fast for Charlotte, AJ and Dev. By the end of this emotional and tense episode everything they thought they knew will be turned inside-out. Who will emerge on the side of truth? What will happen to all those treasured friendships and loyalties? In a stunning revelation the betrayer will be betrayed.

Mark and AJ face the aftermath. In the remains of the e.v.e launch they survey a world seemingly turned upside-down. So many questions are still unanswered. Can their friendship survive? Could someone really end up in jail? And maybe most important of all, where is Charlotte? All will be revealed and more in this intriguing and uplifting Season finale.

Good Shepherd Security’s crack team is carrying out a sophisticated penetration test, involving AJ in a bee costume. The stakes are sky high, as the ‘sting’ has been commissioned by an international bank. There’s a lucrative contract to be had, but Maurice seems to have gone missing and the bank’s multiple layers of physical and data security could thwart the operation at any stage. The team is going to have to bring their ‘A’ game, including Fiona who, as it turns out, has some impressive improv skills.

Mark, Maurice and Fiona have a crucial meeting with Christina Mendoza, the CEO of GBT Bank. The outcome could transform the rocky fortunes of their fledgling company. Meanwhile AJ is engaged in an important bit of ‘outreach’, sharing his security insights and enthusiasm. It’s a tough crowd until he lets slip that he works with a ‘white hat hacker’. Great news, it’s game-on for Shepherd Security - but could this be a job too far?

The subject of the next penetration test is revealed as Verite, the company whose state-of-the-art banking software is currently being trialled by GBT Bank. The Good Shepherd Security team gather in their temporary new headquarters to make a plan. They have just two weeks to overcome a seemingly impossible challenge. And where exactly is Maurice, just at the moment when his unique skill-set is most needed?