Tensions run high when Cutler takes Tom firmly under his wing. He's got big plans for Tom - together they're going to be history makers. Hal's wicked past catches up with him and he finds himself led down a path of temptation. Having succumbed to drinking blood, Hal's second date with Alex doesn't exactly go to plan. Meanwhile, Annie is called to Purgatory by the mysterious woman from the future. She's got big news for Annie: there's only one way to save the earth from imminent destruction by the vampires. But will Annie even contemplate the task that she's given?