House M.D. Season 7 Episode 9

When a manputs 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.