he crash of a cargo airplane near a secret US army base diverts MI-5's attention from the Iran situation. The Ministry of Defense has put out press releases saying it was equipment malfunction but MI-5 learns they may have been carrying biological weapons on board. The US base is known as the UK's own "Area 51" and there is a permanent camp of UFOlogists convinced that there is some connection with alien life. Malcolm goes undercover to find out what is really going on. It all comes full circle when the crash is found to be related to the Iran situation and the identity of Copenhagen is revealed. Ros meanwhile goes off on her own - and against specific orders - to find Zaf who she is convinced is still alive. She is kidnapped by a group known as Yalta, a pro-British/anti-American group that is trying to recruit her.

Resumen IMDb.com