Lost Season Two episode - Return of the Space Vampire

In its voyages through the cosmos, the Earth starship Searcher enters an area of space that is the origin of the evil Vorvons, a species of space vampire that Buck and Wilma encountered in the season 1 episode 'Space Vampire'

As Buck and Hawk are away on a recon mission, Wilma stays on the ship but begins to feel a growing sense that dark forces are stirring within her, and she begins to feel dark urges and a pull towards a nearby planet...