MI-5

Tom Quinn has disappeared after shooting his boss. He is also accused of assassinating the Chief of Defence Staff.

Harry reawakens sleeper agent Fred Roberts, a renowned chemist and family man.

Danny and the team must uncover the truth behind an assassination attempt on a famous novelist. Was he the real target? And who is the enemy?

The latest round of Middle East peace talks are abruptly halted when a key delegate is killed.

A scientist is rumoured to be negotiating with terrorists who want to buy his potentially deadly research.

Zoe is caught up in the deadly fallout of an abortive mission and must stand trial for conspiracy to murder. Can an MI5 officer be culpable for the death of an undercover officer?

MI5 are alarmed when they discover a group is hacking into computer systems across the country. Ruth investigates the possibility that terrorists might be behind the threat.

A celebrity couple on the wane are terrified when their baby is kidnapped. They demand MI5 investigate, but soon MI5 learns that there's more to this kidnap than first appears.

Suspicions are aroused when a known mercenary, recently linked to a new player on the arms smuggling circuit, is seen visiting an old Soviet arms dump.

Danny and Fiona investigate a house they suspect is being used by North African terrorists. While the agents are installing a listening device, terrorists take them hostage.