Liam Neeson has never been averse to slumming it in the B-movie mainstream. With Taken and its sequel, he has virtually made this his calling card, and now with Non Stop he is taking that very successful formula of badass agent to new heights, this time adding a couple of twists. An air marshal (Neesan) springs into action during a transatlantic flight after receiving a series of text messages that put his fellow passengers at risk unless a ransom is paid. The confined space of the aircraft helps build the tension, and director Jaume Collet-Serra makes sure that the audience knows that the action is not meant to be taken too seriously. Which is a good thing, as this is a story in which drama and action are far more important than narrative cohesion or indeed the laws of physics, and Neeson manages to get up to some pretty improbable high altitude acrobatics.