So The Watchers on The Wall is in the books and - unlike every other ninth episode to date - people will likely be split about whether or not the Neil Marshall-directed episode was a success. With a Metacritic rating of 91%, this is technically the lowest rated episode of this incredible season, despite still doing very well critically. Some people were blown away by the cinema-quality action, deft pacing and intensity while others were disappointed that the single-perspective we were given meant that we didnt get to see favourites like Tyrion or Daenerys. In our opinion the episode was an unequivocal success; spending a full hour along The Wall was highly immersive and the action was utterly enthralling. Though it would have been nice to have seen the aftermath of Oberyns death and Tyrions plight, The Watchers on The Wall was a superb episode. We saw Alliser Thorne finally show some signs of redemption, Samwell Tarly kicking ass and the highly moving deaths of Pyp, Grenn and Ygritte. Oh and the Scythe. After being teased with a glimpse of them at the start of the third season, we witnessed the Giants of the Free Folk in a battle situation - rather than just carrying around bundles of timber. Though seeing one of their number using his suitably large bow to demolish a luckless soldier on The Wall was amazing, the massive creatures didnt really have the impact on the battle we had expected. Tormund and his men behind enemy lines seemed to be a far bigger threat. We saw one Giant impaled by a huge bolt and the other killed by Grenn and a small squadron of men. Though Giants will likely have a larger impact in the subsequent sieges by the Free Folk, their disappointing performance in The Watchers on The Wall has got us thinking of what other warriors and beings of Westeros would have the power, skill and speed to defeat a Giant in combat? Here are the 10 things which could kill a Giant: