Claysaba Excellent, Without a doubt!!

Aiden Melton The storyline feels a little thin and moth-eaten in parts but this sequel is plenty of fun.

Ariella Broughton It is neither dumb nor smart enough to be fun, and spends way too much time with its boring human characters.

Logan By the time the dramatic fireworks start popping off, each one feels earned.

Stuart Davies The episodes are well acted and the tension is built to a usually satisfying climax in each case... however the last episode in the series is simply too predictable and unlikely to happen, it becomes obvious and somewhat comical to the extent I found myself cheering as each ridiculous plot artefact unfolded... A fortress building without a contingency for occupants in case of fire, or bomb, in the building... An agent that takes a laptop from the IRA and it doesn't occur to him that it might be booby-trapped? What sort of an idiot would do that? A security system so well designed it is disabled with a bit of chocolate fondant? What utter nonsense. The script writer needs a slap if this is their excuse for a good piece of work.. shame on them.

wlb * I have added this since my initial review. Thanks to streaming services like Netflix and Hulu Plus, one can zip though entire seasons quickly. Seasons 1-5 apply to my review below - but it seems as of Season 6 it has become more like "24" and less realism. Which is fine, I suppose, but the story lines have become more outlandish. Since I don't want to spoil anything you be the judge. Since I started streaming this from Netflix and Hulu, I have become addicted to this series. And I am reminded of a quip actor Michael Weatherly of NCIS gave in an interview - saying that the title of his show really stands for "No Character Is Safe".Perhaps the creators of NCIS got their inspiration from MI-5, which made its debut a year earlier.All I can say is you don't know who will be there for the next episode. Which is shocking at first, particularly if you start to like them but gives the show an edge.I do believe the actual day to day world of the spy is a bit more cerebral and deskbound, but the show is still realistic. I mean, real spies probably would not want an Aston Martin DB5 while on assignment - they want to blend in - and in an episode I just watched one of the recurring characters actually mentioned that he'd prefer a less flashy car to the one he was driving. But I would not be surprised if some real "Spooks" - active or more likely retirees, are technical advisers. It's a great show that has enough realism to make it believable and enough "Hollywood action" to make it enjoyable.

Johnny Utah When i watched the first episode of the first season, i thought this was brilliant.But after watching half of season two I'm just bored. If this is how the real MI5 is run i would be seriously worried. They act like bloody fools. The show has been compared to the American 24 I'm not sure if thats is a good thing or a bad.They fumble around they seem to take a lot of unnecessary risks and every episode always ended with a huge anticlimax. They could have done with some more action in the show. They build up so you sit and Wait for something exciting to happen,than it all just flattens out to nothing but some small talk and a pat on the back

Carlo This is one of the best TV series of its kind. Most spy stories are far-fetched tales of brave heroes who single-handedly save the planet from villains ready the blow up the whole world, and of course they do it all by themselves, by sleeping with beautiful women, jumping from 50 metre tall buildings, killing an army of villains with just one revolver, etc etc etc - think of the 007 and the Mission Impossible movies, for example.This is way more realistic. Of course there are some holes in the plot, but in general this TV series tends to be about team work by a group of ordinary people who happen to work for MI5, and whose work, in fact, takes its toll on their private lives. The actors of this TV series will plant bugs in a house, try to infiltrate terrorist cells, do intelligence work etc all to stop the villain in each episode, but it is all quite realistic: there isn't a computer analyst that can retrieve everyone's school records from 50 years ago in 10 seconds, like in Criminal Minds, nor unrealistic heroes of the kind played by Sean Connery, Tom Cruise, etc. Nonetheless, or, actually, because of this, the stories are never banal and, in fact, most episodes are mini-thrillers: you think you figured it all out but only in the last ten minutes do you realise that you, in fact, hadn't.Another aspect I really appreciated is that it doesn't try to portrait security services as the 'good guys' against the 'bad guys' who simply 'hate us for our freedoms'. In many episodes of the show, for example, the motives of the villains are related to things like war atrocities committed by Britain and by Nato. You will hardly find any of that in American shows. Take '24', for example: that show is all about 'us' vs 'them', about how the end justifies the means, and about how it is right to torture prisoners, etc. Spooks is entirely different, which is one of the many reasons it is one of the best TV series of its kind, ever.