The Walking Dead

This zombie apocalypse series has been shuffling across the screen since 2010.

The unthinkable happens. Disaster hits, society collapses and the bulk of the world's population becomes shuffling, brain-munching members of the undead. Yes, a zombie apocalypse is in full swing — but how long does it last? In The Walking Dead's case, the answer is 11 seasons. Ten have already aired since 2010, and the show's final go-around will arrive in 2021. Whether you're well acquainted with its dystopian world, or you've somehow missed this TV horror classic, that means there's already 146 episodes to sink your teeth into.

The story, as adapted from the comic book series of the same name, will sound familiar. But you don't squeeze over a decade's worth of life out of the concept without delivering some drastic twists and turns — and plenty of gore, too. The premise: awakening from a coma, sheriff's deputy Rick Grimes (Andrew Lincoln) learns that the zombie-free life he previously knew has well and truly disappeared. His first aim is to find his wife and son, but that's not the most straightforward feat when you're surrounded by walkers.