Slashers got sophisticated in the '90s, evolving from Freddy Krueger to Candyman to the terrifying Hannibal Lector. The 2000s brought "torture porn" – a response to post-9/11 panic.

The fear that demons will enter our bodies and make us do terrible things has inspired some of the most frightening films ever made, including the masterpieces Rosemary's Baby and The Exorcist.

Monsters hold a special place in the history of horror. Stephen King, Tippi Hedren and Joe Dante weigh in on the killer predators in nature, the nightmare creatures of the fantastic, and the monsters inside us, waiting to escape.