The line "it could be an inside man... or woman" made me laugh. Cheesy!
I knew Craddock was shady as soon as she coerced David into spying on Julia by implying his family would be kicked out of the safe house if he refused to do it, a whole bunch of episodes ago!
What surprised me was that Anne Sampson wasn't in on the conspiracy as well. But then, even though both Sampson and Craddock wanted him to spy on Julia, Sampson didn't take part in coercing him into it.
I thought everything - bombings, murders and all - was going to be some huge conspiracy involving all the politicians from the Prime Minister on down. But okay, that would have been too predictable. It's a bit disappointing they were just red herrings acting shady because they were trying to get the tablet so they can keep their dirty little secrets. But they wouldn't murder, no! That was some criminal's doing! Some criminal who came out of left field!
I didn't understand why Nadia would admit to everything, conveniently before the end of the show. But I guess it makes sense if she feels her whole plan is complete, she would want to "take credit". Here's why I didn't suspect her of being some kind of mastermind - those aren't the people who gets sent out to blow themselves up! They send the idiots, not the geniuses with mad valuable bomb-building skillz!
It sure wasn't because I didn't think a Muslim woman could be an engineer.
I did think it was suspicious that she can speak English. That was a hint all along that she's well-educated. I did wonder at the time if she only said Longcross supplied the bomb because it looked like David really wanted her to say that. But I thought it would be because she wanted to "help" by saying exactly what he wanted her to say, I didn't think she wanted to kill him this whole time!
So wait a minute - does Nadia know David is still alive? I'm guessing she assumed he died. If she knows he's alive, then she shouldn't feel like her plan is all done and it's time to take credit for her work. Unless she considers toying with him instead of killing him close enough!
In a different story, maybe Nadia could have been a compelling and fascinating character. Here, she's a plot device doing whatever the plot needs her to do. Hey, I was entertained, so can't complain too much, but it feels a bit thin in the end, as if the story didn't completely live up to its potential. It's like the show was so focused on obfuscation, it valued the "big twists" so much, that actually telling a coherent story became unimportant.
I liked the sappy ending with the happy family though. It's silly but it feels nice. I get a bit tired of so many other shows ending on down notes (even though that's often a smarter way to go).