At the beginning of this and the next episode, the "M.D." is removed from the title as House doesn't have his doctor's license.
As House (Hugh Laurie) and Wilson (Robert Sean Leonard) are the only regulars to appear, these episodes don't use main titles.
On the bus at the end of the episode, House's shirt is the same shirt Alvie was wearing during Freedom Master's first group session.
Actors Franka Potente (Lydia) and Derek Richardson (Freedom Master/Steve) are married in real life.