So, spoilers aside...

It's a great drama. Acting, writing, direction and production all deserve a nod, but depicting that a conspiracy at the highest level ends in the DCI - or DCSI - being the lead accomplice for the various horrific actions of violence & deception, is a farce.

This drama observes reality as much as eating a burger equals a heart attack.

Typical BBC propaganda. Described as 'it must have been the terrorist (or Oligarch type evil) who did it' without any connection to the Govt. Or its many agencies of misdeed or misinformation being responsible, is just playing to the sleeping or misguided audience it's aimed at.

Great drama. But do the producers' live in a world where their audience is so infatuated with the deceptions they're given that they're incapable of deducing truth?

8/10 (would have been higher without the propaganda.)