What is the title of the House M.D. episode about three patient histories?

The House M.D. episode about three patient histories is titled “Three Stories.” It is the 21st episode of the first season and originally aired on May 17, 2005.

The episode presents House teaching a lecture about diagnosing leg pain. The narrative moves between three cases, including a version of House's own medical history, while the audience gradually learns how his leg injury affected his life and behavior.

“Three Stories” is notable for its non-linear structure and for turning a classroom lecture into a central character reveal. The episode won the Primetime Emmy Award for Outstanding Writing for a Drama Series, making it one of the most acclaimed installments of the show. Its title refers to the three cases being discussed, not to three seasons or three members of House's team.