Now that Derek has the engagement ring, he searches for the perfect way to propose to Meredith, as Lexie demands that Mark go public with their relationship, and Bailey, encouraged…

Addison, Naomi and Sam rush the ailing Archer to Seattle Grace and reunite with old friends Derek and Mark to help save his life; meanwhile, Izzie employs her fellow doctors…

Derek’s confidence is shaken like never before as he faces off with Addison over what course is best for their dying pregnant patient; Cristina calls the abilities of a renown…

Derek decides to quit after learning that more of his patients have died than survived; Izzie’s interns make an unsettling discovery about “Patient X.”

After his fellow surgeons try and fail to bring Derek back to work, Meredith must summon the strength to convince him. Meanwhile the hospital is abuzz as Mark attempts a…

One of Meredith’s oldest friends, Sadie, becomes an intern at Seattle Grace, but Mer’s friends are less-than-welcoming to her.

Meredith, Cristina and Bailey come to Lexie and Sadie’s rescue when a routine surgery goes horribly wrong, as Owen and Derek treat a man seriously injured while sleepwalking and Mark…

Cristina is awarded the first solo surgery among the residents, but she is forced to give it up and choose her replacement; Lexie is impressed when Mark performs a cutting-edge…

Derek’s mother, Carolyn, makes a surprise visit to Seattle and meets Meredith for the first time, as Mark tries to conceal his relationship with Lexie from her as well; meanwhile,…

Bailey grows desperate as a patient’s condition becomes more and more dire. Everyone in the hospital is stepping up to try to find the boy a new organ donor, including…

The chief gives Bailey new power and responsibility. He also gives her a very difficult surgical assignment: remove a girl’s inoperable tumor. Meanwhile, new trauma chief Owen (Kevin McKidd) challenges…

When the Chief makes an announcement that a solo surgery is up as an award, the residents are sent into a frenzy all trying to get an edge over one…

The shooting of a local businessman is linked to a killing in Iraq, and McCoy and Rubirosa refuse to allow the killer to plead out.