This is the year of alien invasion. After superheroes, alien invaders might be the most popular media trope of the year. They're dominating movies like Cowboys & Aliens and Battle: Los Angeles and TV shows like V and Falling Skies.
Not to mention Joe Cornish's Attack The Block and Timur Bekmambetov's Darkest Hour. And there are a number of other alien invasion movies and shows in development, from directors like Eli Roth and Nacho Vigalondo. And Warner Bros. is developing All You Need Is Kill. After being a dead genre for years, alien invasions are back. But what's it all about?