House M.D. introduced the hospital-wide competition to choose House’s new team in season 4.
The storyline begins after the original diagnostic team breaks apart. Gregory House is required to assemble a replacement group, so he interviews and tests a large pool of doctors. The competition turns recruitment into a continuing plot, with candidates identified by numbers and eliminated as House evaluates their medical judgment and personalities.
Season 4 premiered in 2007 and contains the two-part finale “House’s Head” and “Wilson’s Heart.” The new team ultimately includes Lawrence Kutner, Chris Taub, and Remy Hadley, known as Thirteen. Foreman later returns to work with the group.
The competition is sometimes confused with the show’s earlier team formation, but the original trio was already established in season 1. Season 4 is specifically the season built around replacing that team and selecting new fellows.