"GREY'S ANATOMY - In the first hour of part two of the season finale of ABC's ""Grey's Anatomy"" -- ""Deterioration of the Fight or Flight Response"" -- 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. In the second hour, ""Losing My Religion,"" Richard goes into interrogation mode about a patient's condition, Callie confronts George about his feelings for her, and Meredith and Derek meet about Doc. Part two of the season finale of ""Grey's Anatomy"" airs MONDAY, MAY 15 (9:00-11:00 p.m., ET) on the ABC Television Network. (ABC/SCOTT GARFIELD)ELLEN POMPEO"