Good cast and exciting plot. I think that in order to raise the excitement and make Tom Dawkins more vulnerable they gave him no friends or allies at all. It seems he had no one in the intelligence or military services that he could trust and was constantly fed bad or no information. He was very isolated and this was not really believable, as was his inability to protect the GCHQ girl who was helping him. I thought he was Prime Minister ! Having made those criticisms I was entertained and I thought Byrne was excellent as was the supporting cast. Nice to see Stephen Dillane on the box again. The good guy lost so any chance of a follow up series ?