“This is the first hour of a 2-hour season premiere. A two episode entries have been created. The 10pm EST marker will mark to beginning of the second episode. In the two hour fifth-season opener, Meredith and Derek discover the morning-after side of their renewed relationship; a military doctor (Kevin McKidd) who arrives at the hospital with a trauma patient catches Cristina’s eye; and the chief learns that Seattle Grace’s national rankings have slipped.”