In House M.D., which fictional character is known as “Thirteen”?

In House M.D., “Thirteen” is the nickname of Dr. Remy Hadley. Olivia Wilde played the character, whose given name is revealed as Remy Hadley during the series.

Thirteen becomes a member of House’s diagnostic team after competing for a position at Princeton-Plainsboro. The nickname comes from her number in the applicant selection process, not from her medical specialty. Her storylines include her diagnosis with Huntington’s disease and her efforts to manage the uncertainty surrounding that inherited condition.

The character is often confused with Amber Volakis because both are associated with House’s team-selection storyline. Amber is a different physician, played by Anne Dudek. Thirteen’s nickname is also separate from the number of a season or episode; she is identified by it as a recurring member of the diagnostic staff.