Lucien is one of Marlowe Viccellio's roommates. When Shawn, Gus and Juliet discover that the customer who asked Thorn for a pint of real blood made the call from Marlowe's house, they immediately assume this was Lucien due to his typical vampire name and bring him in for questioning. Shawn and Gus take no chances and enter the room before Juliet to test Lucien with garlic, silver and water blessed by Peter Westley. Unsurprisingly, this has no effect beyond befuddlement and Juliet soon takes over the confrontation with a rather more traditional style of interrogation, inquiring after his alibi for Hamilton Deane's murder. Lucien explains he was working late at King Putt Mini Golf and provides them with his manager's name, Wayne. Shawn renews his belief Lucien could be a vampire when he suddenly remembers a room at Marlowe's place with a cracked mirror and a litter box, but Lucien says that he lives in a tent in the backyard and that the room he's referring to is Ed's. They now have a new top suspect.

