MI-5 is having a particularly busy day. They have just exchanged spies with the Russians and welcome the return of Lucas North after 7 years of imprisonment. Harry Pierce ...

Environmental terrorists take control of the Thames barrier just as a major storm surge threatens to flood the London area. They demand that the British government publis ...

Adam Carter finds himself hunting for a onetime friend, Richard Dempsey, when Harry Pearce orders the man assassinated. Dempsey was once an agent but apparently went over ...

Harry Pearce is less than pleased when he learns that MI-5 video surveillance of a suspected terrorist, Khalid Mansour, has been ruled inadmissible and that Mansour will ...

The UK government's decision to sell nuclear reactors to Saudi Arabia raises many concerns in the the various services but MI-5's immediate concern is that one of four Sa ...

Ruth Evershed finds herself in the middle of an investigation when a man for whom she provided change at a tube station commits suicide by jumping in front of the train. ...

Adam survives the assassination attempt by Angela Wells but while he is in hospital recovering, major terrorist attacks are directed against fuel depots crippling British ...

Still in shock and unable to properly grieve, Adam Carter insists that he must return to work and keep himself occupied. Harry Pearce isn't so sure and he has Adam monito ...

Fiona Carter goes undercover when MI-5 receives a report that the Syrian Foreign Minister may be prepared to provide the British with information. She and Jo Portman repr ...

When 6 local Councillors in East London switch their allegiance to the right-wing British Way party, there is fear of race rioting in the area. MI-5 is called in to deter ...

As the team buries their dead colleague, a bomb goes off in a nearby market. The group, Shining Dawn, demands the release of their leader Michael Monroe or they will deto ...

After the police raid a house and find evidence that terrorists may be planning an attack in London with Sarin gas, Danny and Fiona Carter, who has now transferred to MI- ...