House M.D. broadcast 177 episodes from 2004 to 2012. Those episodes were distributed across eight seasons of the Fox medical drama.
The series used a case-of-the-week structure in which Gregory House and his colleagues investigated difficult diagnoses, while continuing storylines developed around House's addiction, friendships, staff changes, and personal relationships.
The episode total includes the two-part season-six premiere as two episodes in standard episode counts. It also includes the retrospective special “Swan Song,” which aired immediately before the series finale and was listed as part of the final season's broadcast material.
Episode counts can differ in guides that group two-part stories together or exclude specials. The commonly cited total for the television series is 177 episodes, making it distinct from the number of seasons, which was eight.