When a man (guest star Matthew Lillard) puts his life on the line to save a stranger who fell onto the subway tracks, he emerges from the dramatic scene miraculously unscathed but then suddenly collapses. Both the hospital and the town become captivated by the man?s selfless deed, but as the team works to diagnose his symptoms, they discover that the hero?s seemingly life-changing deed failed to break old habits. Meanwhile, House tries to avoid Cuddy?s birthday dinner with her opinionated mother Arlene (guest star Candice Bergen), and Taub draws unexpected attention when his face graces billboards advertising the hospital. As Taub and his wife reignite a physical relationship, Masters? (guest star Amber Tamblyn) outside perspective helps him realize that it?s time to take action on his crumbling marriage.