On the day that work experience student, Saara, joins GCHQ, The Russians launch a cyber attack on The UK.

Every so often Channel 4 releases a drama that makes you pause and think, a few years ago that happened with Blackout, the same happened here, a what if scenario that leaves you feeling a little unnerved, the idea that events could actually happen.

Well produced, well acted, it moves along nicely, it's a deep story with several stands, all of which tied together neatly. The variety is great too, episode three in particular is so unique.

I thought the acting in general was excellent, the standout for me had to be Mark Rylance, he wasn't in it a great deal, but he was outstanding. Nice to see Simon Pegg in a serious role, he did a good job. Adrian Lester felt underused.

There are a few flaws, Saara's on work experience, she has a very political boyfriend, and yet roams freely around GCHQ, as if she has top level clearance, that did feel a little too far fetched.

Overall, a truly interesting and thought provoking watch, bravo Channel 4, 8/10.

I thoroughly enjoyed this series, 8/10.