Its best days might be long behind it, but there's no discounting the fact that 24 is one of the most influential and beloved shows in the history of television. Its "real time" setting had a huge impact on how serialised drama would unfold in the following years, and even as it spawned countless imitators, not a single one has quite managed to match the original. Though the show is currently off the air and the prospect of a tenth season remains unclear (even though the Live Another Day event was a huge success), its fanbase is utterly unwavering in its devotion. From the countless 24 drinking games to the hilarious character nicknames (Curtis is "BlackJack Bauer"), it's the fandom which keeps the show alive and will likely get another season made...eventually. Whether you're a hardcore fan or a casual who dips in and out, there's a good chance these facts (24 of them, appropriately) will catch you off-guard. Did you know who almost played Jack Bauer? Which of Kiefer Sutherland's co-stars hated working with him? And just how many people from the movie RoboCop show up in the series anyway? Find out these answers and more: here are 24 mind-blowing facts about 24...