Known Unknowns

After a wild night out, a teenage girl is brought to Princeton Plainsborough 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. Meanwhile, Cuddy, Wilson 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 returns.

Unwritten

A children's novelist tries to kill herself, but is thwarted when she has a seizure. House, a fan of the books, puts her on psych hold but has to deal with a patient that is eager to die rather than be cured. Meanwhile, House worries that he'll lose Cuddy because they have nothing in common.

Selfish

A seemingly healthy 14-year-old girl collapses during a skateboarding exhibition; House and Cuddy face the challenge of handling their romantic relationship at work.

Now What?

House and Cuddy are exploring the ramifications of those feelings and attempting to make a real relationship work. Meanwhile, due to a colleague's illness, Princeton Plainsboro is left without a neurosurgeon on site, threatening the hospital's accreditation as a Level 1 Trauma Center. As the team attempts treatment to get their sick colleague back to work, they discover there is more to the illness than they originally suspected and turn to House for direction. Instead, House remains elusive, leaving the team on its own.