Star Trek: Voyager: Season 6, Episode 25

6 - 25: The Haunting of Deck Twelve

When Voyager encounters some engineering problems, Neelix keeps the Borg children entertained with a ghost story about an electromagnetic life force that holds Voyager hostage while trying to make contact with Janeway and get itself home. It's the story of an adventure the crew experienced several months ago with the ghost that lives on Deck Twelve.