Episode 35 of "Grey's Anatomy"
s02e26 Deterioration of the Fight or Flight Response
Title: Deterioration of the Fight or Flight Response
Original Air Date: 05/15/2006 on ABC
Plot Outline:
Izzie and George attend to Denny as the pressure increases to find him a new heart, Cristina suddenly finds herself in charge of an ER, and Derek grapples with the realization that the life of a friend is in his hands.