DS Ewan Striker is the best detective on the force. Unconventional and uncompromising, he is respected and feared in equal amounts. Tag Westland is a rookie. A rich boy who has realised that being a cop is not as glamorous as he first thought. In fact, he has his resignation in his pocket. These two unlikely crime fighters are thrown together, as it becomes apparent that each of their investigations are inextricably linked to something even more evil: a major terrorist attack.

Frankie Verdi, Eddie Williams and Tony Thompson are The Three Dogs. A ruthless criminal gang. A law unto themselves. Detective Jim Hacker has watched the Dogs grow from thuggish youths to psychotic criminals and seems to be the only cop in town with the determination to see justice done. Meanwhile Jamie Strange, a young Royal Marine, finds himself embroiled in the lives of the gang when his girlfriend, Laurie Holland, cuts off their engagement...to be with the most dangerous of the Dogs: Frankie Verdi. 

Murderous jihadists have been crossing the English Channel, passing themselves off as asylum seekers. MI5 have been keeping them under surveillance, but what starts as a simple terrorist takedown goes badly wrong, and dozens of innocent civilians are killed in the heart of London. And the screw is tightened when a bomb takes out senior members of the Secret Intelligence Service.

Rookie Cop Dave Stewart knew that William Bailey was guilty of murder. All he had to do to convict him was change one line in his statement. Detective Chief Superintendent John McCauley loves dirt. He collects it in secret files to use against his enemies, and since Stewart slept with the beautiful Detective Sergeant Anne Wallace, he is the enemy. Stewart hatches a plan to destroy the evidence against him, but inside McCauley's files is evidence of a vile paedophile ring operating under the Chief's nose. Now three people are dead, and Dave Stewart is the prime suspect.

British M16 Agent and former SAS trooper Jack Tate is trying to escape his past when he witnesses a terrorist attack of unthinkable scale. An electro-magnetic pulse knocks out the US power grid, killing anything with a computer processor, throwing the whole country into chaos. Under the cover of the blackout, a clandestine operation aims to assassinate prominent public figures on US soil. Looting and violence spreads across the country. And Jack Tate’s past comes back to haunt him. 

When an MI6 agent is found to be keeping records of his missions to protect himself from betrayal he unwittingly makes himself a priority target. But how do you silence the most dangerous man imaginable? Send him into hell on earth. While Alex King is sent into Northern Iraq to tidy the loose ends of a botched mission, the archipelago of Indonesia is under communist threat from within its own military. A consortium of worried businessmen call for desperate measures and seek the services of an assassin.

Alex Reeve was Operative 66. A former special-ops soldier and one of the UK's deadliest weapons, he was a member of the secretive SC9 - an elite security service with a remit to neutralise the country's most dangerous enemies. Falsely accused of treason, Reeve was forced to hide in the shadows as the brutal assassins he once trained alongside sought to eliminate the 'rogue asset' at any cost. But tricked into revealing himself, Reeve is suddenly dragged into a lethal conspiracy involving the British state, shadowy Russian agents...and his own father.  

When foreign governments act like gangsters, a new kind of SAS is needed.... In London, assassins carry out a deadly chemical weapons attack at the royal wedding. All the signs point to a Kremlin-sanctioned hit. Their victim: a notorious mobster. 'The Cell' is a shadowy unit within the SAS, dedicated to fighting global organised crime. In a world where the Russian government is the real mob, it's the job of the Cell to defend British interests at home and abroad. Only the elite are selected; only the very best will survive.

He's back and better than ever. James Ryker, a veteran intelligence agent now freelancer, working for the secretive Joint Intelligence Agency on an op-by-op basis, finds himself embroiled in a complicated mission that will test him to his limit. When a simple surveillance mission goes awry and the key target is kidnapped in broad daylight in a busy London square, Ryker knows he has his work cut out. Ryker is tasked with figuring out what went wrong. But when his good friend Sam Moreno disappears without a trace, the mission becomes more personal than he could have imagined. 

SAS trooper Matt 'Lastman' Standing is a lethal killing machine with experience in Afghanistan, Iraq and Syria. Plus he's worked with French in the past. It's not a mission he wants, but Standing made a bad choice in his past, and it has come back to haunt him. Now he's hunting French in the lawless Wild West forests of Humboldt County, where the US produces most of its legal - and illegal - cannabis. But French isn't the only predator in the wilderness - there are Mexican cartels, Russian Mafia and Hungarian gangsters - and Standing has to overcome them all to get to his target.

Billy and Charlie thought their killing days were behind them. They used to be prolific life-takers, but old age finally caught up with them. Now they are ending their days in a dismal nursing home in Blackpool, with only their memories to keep them going. Memories of murder and mutilation. But when Archie turns up at the home, everything changes. Archie is a breath of fresh air, and he puts new life into Billy and Charlie—and before long, they realise that it's time to start killing again.

Former soldier. Ex-copper. Current man on the edge. Shunned by his old colleagues, and dividing his time between a dead-end job and the bottom of a whisky bottle, former Police Scotland detective superintendent Bob Hoon’s life is a mess. Then an old face from Hoon’s Special Forces days turns up asking for help: His teenage daughter has been missing for months, the police have drawn a blank, and he needs the kind of help that only Hoon can provide. And besides, Hoon owes him one.

Ryan Drake is a man who finds people who don't want to be found. Once a British soldier, he now works for the CIA, leading an elite investigation team that tracks down missing agents. But his latest mission - to free a prisoner, code-named Maras, and bring her back onto US soil within 48 hours - is more dangerous than anything his team has attempted before. Hunted by his former comrades, Drake is left with no choice but to trust a dangerous woman he barely knows.

Russian troops are preparing to cross the border into Belarus, threatening its independence. The only thing facing them are an armed partisan group, but they are poorly trained and will be no match for the Russians. The British government wants an independent Belarus as a buffer against Russian expansion - so Shepherd is despatched with a crack SAS team to help the partisans.

Court Gentry is known as The Gray Man—a legend in the covert realm, moving silently from job to job, accomplishing the impossible, and then fading away. And he always hits his target. But there are forces more lethal than Gentry in the world. And in their eyes, Gentry has just outlived his usefulness. Now, he is going to prove that for him, there's no gray area between killing for a living-and killing to stay alive.