12 Unsolved Movie Mysteries That Drove You Mad

9. Who Was Supreme Leader Snoke? - Star Wars: The Last Jedi

The world was left stunned when, two-thirds of the way through Star Wars: The Last Jedi, Supreme Leader Snoke (Andy Serkis) was sliced in half at the hands of Kylo Ren (Adam Driver), despite the expectation from fans that he'd be the trilogy's Thanos-esque big bad.

And with that Snoke was jettisoned from Star Wars before anyone really had much of a clue about who he was, naturally leaving many fans incredibly miffed in the process.

Andy Serkis has stated that in his own mind Snoke was several hundred years old and had his skull disfigured by a prior battle - two things most fans can pretty safely deduce regardless. In terms of concrete information, though, it's pretty much up to the fans.

A popular fan theory suggested that Snoke might in fact be the infamous Sith Lord Darth Plagueis, who had found a means to triumph over death though ended up apparently murdered in his sleep by Palpatine (Ian McDiarmid).

With Episode IX almost certainly focusing on Kylo Ren supplanting Snoke as the Supreme Leader, there's not much reason to expect we'll ever get a satisfying explanation for his origins, at least in the movies. Keep your fingers crossed for a novelisation spilling the beans, though.