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 ...

Convinced that his Russian counterpart in London, Arkady Katchimov, is behind the Al Qaeda bombing that killed Adam Carter, Harry Pearce launches an unauthorized investig ...

When a Pakistani agent informs them that there is an Al Qaeda cell planning an attack in London, MI-5 go into action. They already have an agent in place in the terrorist ...

MI-5 is approached by Mohammed Khordad, the number 3 man in Al Qaeda, for a meeting. Under normal circumstances, they wouldn't even think of meeting the leader of a terro ...

MI-5 try to stop a ruthless City financier who is out to force the collapse of a major bank. Manipulating the market is Alexis Maynell's specialty. Ros Myers goes underco ...

With the military situation in the Middle East rapidly deteriorating and a UN Special Envoy about to hold crisis talks in London, MI-5 come across a teenager selling a hi ...

Sugar Horse is revealed to be a network of sleeper agents in Russia. They are there for use only in the direst of circumstances. Just as the West's relations are on the b ...

With the Russian mole inside MI-5 now in custody, the team tries to decipher the information Lucas North obtained in Moscow. It is apparent that the Russian intelligence ...