It's a statement often made by those in the midst of time travel: "I know I can do it, because I already did." At this point, it's even been used in the Harry Potter series. But what happens when the things that must be done - because they already have been - are morally wrong, or downright criminal? Can they be changed, or is there no choice?
That's the question raised by the Spanish film Timecrimes (originally titled Los Cronocrimenes), the most likely entry on our list to have slipped by even devout time travel junkies. Written and directed by Nacho Vigalondo, the 'less is more' theme runs through all elements of the film, with a total cast of just four players.
The less said about the plot the better, but believe us when we tell you that the many twists and turns will leave any moviegoer hoping that they never find themselves sent backwards in time.