Wed at 20:00 KSA on SHOWSERIES

Operations. Temptations. Frustrations.

The doctors of Seattle Grace Hospital deal with life-or-death consequences on a daily basis - it's in one another that they find comfort, friendship and love. Together they're discovering that neither medicine nor relationships can be defined in black and white. Real life only comes in shades of grey.

Season five ended in on what is probably the show's most shocking, emotional and powerful finale to date - the revelation that Seattle Grace's mystery patient John Doe was none other than their own George O'Mally (T.R. Knight).

The season closed with George undergoing lifesaving surgery, while fellow doctor Izzy Stevens (Katherine Heigl) flat lined, before her friends and colleagues chose to ignore the DNR and set about resuscitating her…