season. Amber re-appears as House's hallucinated helper at the end of the episode "Saviors," and in the succeeding episode "House Divided," where House continues to see her. She is revealed to have become a part of his unconscious, now risen from his insomnia and his guilt over failing to foresee Kutner's suicide and over her death earlier. House first seeks to shut out his hallucinated friend with sleeping pills, but later engages proactively with her to figure out a case. A misdiagnosis is almost fatal to the patient; as is Chase's case of anaphylactic shock at the bachelor party House throws for him, when Chase licks a stripper unknowingly covered in strawberry flavored body butter, to which he is allergic. House imagines "Amber" may have been trying to murder Chase, he takes the sleeping pill at the end of the episode, but he finds he is still seeing her, and in the next episode "Under My Skin" it appears his hallucinations are due to his use of Vicodin and he must detox. In the season finale, after it is exposed that House hallucinated his detoxification, Amber re-appears. Amber made her final appearance, her first in three seasons, in the series finale "Everybody Dies", as a hallucination of House and not able to participate in the team. Critic Kelly Woo, from TV Squad, placed her on #3 on her list of "Seven new characters that worked" just below Losts Benjamin Linus and Desmond Hume. Lucas Douglas Lucas Douglas (Michael Weston) is a private investigator. He is hired by House in the fifth-season episode "Not Cancer" to spy on House's team and gain information about them. Among other things, he finds out about a secret bank account started up by Taub's wife of which Taub is unaware. Impressed by his thorough efforts, House decides to put Lucas "on retainer." Next, in "Adverse Events", House uses Lucas to gain information about Cuddy's personal life. Lucas, though, had also begun to take a romantic interest in Cuddy. In "Lucky Thirteen", House uses him to spy on Wilson because he suspects he was lying about where he was one morning. Lucas finds out that he's dating a hooker and that he's doing drugs. House then figures out Wilson was trying to throw him off because he knew Lucas was following him. It is also revealed that Lucas got the keys to all of his fellows'