 This episode was produced as episode 18 of Season 1. When the first  season was cut short due to the success of  _"Greys Anatomy" (2005)_ (qv), the last 5 episodes of the season  were held back until Season 2. For unknown reasons, it wasnt aired  at the beginning of the season but instead held until near the end  of Season 2, with a completely reworked story to eliminate the old  characters and integrate the new ones.