Slow Horses is a pretty good spy thriller that's definitely worth watching. I never read the books so I didn't know much about it but the reviews have been great so I gave it a chance. Gary Oldman is as terrific as ever and leads a very talented cast. Oldman has been so great in so many movies/shows that it's hard to keep track but this is absolutely one of his best performances yet! I have to admit that the first 2 episodes started a little slow and it was hard to get into but by the end of episode 2 it really picks up and from there on out it will keep you entertained and guessing what's going to happen next! It's already been renewed for another 3 seasons (through season 4) which is pretty much unheard of so that right there should tell you how good this show is. If you're looking for a new show to watch and you're into spy thrillers then give this a try...you won't be disappointed!