Remy "Thirteen" Hadley, M.D., is a fictional character on the medical drama House, portrayed by Olivia Wilde.

[1] The character's nickname derives from the episode "The Right Stuff", when she is assigned the number during a competition for her position at the Princeton-Plainsboro Teaching Hospital.

During House's new team member selection process in the fourth season, she simply lets her fellow applicants refer to her as "Thirteen" rather than her real name, and constantly deflects curious prodding from both House and Amber Volakis about her personal life and past.

Both Thirteen and House are equally critical and understanding of each other's self-pity and fatalism in the face of miserable circumstances.

House states that this is her defense mechanism, because if she can convince herself that she would have been miserable either way, she does not need to resent the fact that her life is full of misfortune rather than fortune.

Thirteen has a fifty-percent chance of having inherited Huntington's disease from her mother, but she initially refuses to be tested for it because not knowing allows her to live with hope.

[4] Shortly after this, she begins to display reckless behavior, having casual sex with random women, using drugs, partying late and showing up at the clinic with a hangover.

Initially after being diagnosed, she exhibits sensation seeking: staying out all night, using recreational drugs and having repeated one-night stands with women.

She later ceases to behave self-destructively after a near-death experience in the episode "Last Resort", wherein she realizes her conviction to live, agreeing to participate in a Huntington's disease drug trial and becoming more active in her attempts to prolong her life.

When Thirteen briefly returned to consult on a case, House subsequently fired her permanently so that she could focus on being happy with her girlfriend in whatever time she had left rather than worry about work.

In the episode "Don't Ever Change", Thirteen's contempt at the idea of being categorized or oversimplified leads to both House and Foreman to assume that she is bisexual, although she is surprised and does not respond to either of their comments.

She becomes more open and blatant about her sexuality as the series progresses and her relationship with her colleagues grows, going as far to propose the idea that she might drunkenly make out with a stripper in order to gain an invite to Chase's bachelor party.

In her game of truth or dare with Wilson, she initially states that her father is supportive of her sexuality, although she later corrects this, saying he is in fact unaware and she never came out to him.

The episode "Let Them Eat Cake" shows that as a child she resented her mother who was dying from Huntington's and she tells Chase that she knew her father was having an affair; other than this, very little is shown about her past.

At the end of the fellowship competition, Lisa Cuddy tells House that, since he already has Eric Foreman on his team, he may only hire two additional people, so House fires Thirteen and Amber, claiming fellow applicants Chris Taub and Lawrence Kutner outperformed her, and that if he could keep Thirteen, he would.

Initial relationship strains develop during the episode "Simple Explanation (5.20)" when Foreman tells Thirteen he needs time to himself to grieve and process Kutner's suicide.

In the sixth-season episode "Instant Karma", Thirteen attempts to book a one-way flight to Bangkok, Thailand, citing a need for a vacation.

House is evasive about whether he did it for his own benefit, Foreman's or Thirteen's, but Wilson surmises that it is simply because he likes having her around and he needs her.

In the season-seven premiere "Now What", Foreman reads her letter and goes through her locker, finding flight tickets as well as information on an experimental treatment for Huntington's in Rome.

With her teammates believing she will be leaving for Rome the following day, Thirteen affirms her friendship with Foreman and Taub tells her he approves of her seeking any chance of getting better.

Thirteen returns in the show's 150th episode, "The Dig",[7] where House meets her upon release from a prison where she has been incarcerated for the last six months for over-prescribing drugs.

Upon her return to work, House notices a change in her personality, as she has become more cynical and fatalistic, appearing resigned to misery.

[13][14] Wilde described Thirteen as "almost the opposite" of Cameron, who is "compassionate and emotional", and attributed the comparisons to the similarity in the tasks that House delegates to both characters, and that "with two girls on a show, people are always going to compare them.