The film that truly put the Marvel Cineverse front and centre saw Iron Man (Downey Jr.), Captain America (Evans), Thor (Chris Hemsworth), The Hulk (Mark Ruffalo), Black Widow (Scarlett Johansson) and Hawkeye (Jeremy Renner) join forces to take on bad guy Loki (Tom Hiddleston) and his army of interdimensional aliens. Don't worry - you don't need to have seen the previous Marvel movies to get the general gist as this is pure blockbuster entertainment.