In House M.D., the doctor known as “Thirteen” has the surname Hadley.
Her full name is Remy Beauregard Hadley, and Olivia Wilde plays her. Thirteen joins House’s diagnostic team during the selection process in season 4, when House interviews a large group of applicants and assigns them numbers before finalizing his new team.
The nickname “Thirteen” comes from the number House gives her during that competition. It becomes the name most characters use, even though her given name is Remy. The character is a physician with expertise in internal medicine and later works in other medical settings after leaving House’s team.
Thirteen’s story includes Huntington’s disease, a hereditary neurodegenerative disorder. Her mother died of the disease, and Thirteen eventually learns that she has inherited the gene. The diagnosis gives added context to her guarded personality and her interest in personal choice, risk, and quality of life.