Known Unknowns is a 6th season episode of House which first aired on November 9, 2009. After a wild night out, a teenage girl (guest star Annabelle Attanasio) is brought to Princeton-Plainsboro Teaching Hospital with severely swollen appendages. The team must work to diagnose the young girl, who is less than honest about what happened the night she fell ill. As her condition worsens, she becomes unable to distinguish fact from fiction and she starts to lose blood faster than the team can transfuse. Meanwhile, Wilson, Cuddy, and House spend a weekend away from the hospital to attend a medical conference, but things don't go as planned when House's private investigator, Lucas Douglas, returns. House confesses his feelings for Cuddy to Wilson who says that she is better off without House. Cha