When Alex’s younger brother, Aaron, shows up at Seattle Grace-Mercy West with a hernia, it’s up to Alex to get Bailey’s approval for his pro bono surgery. Matters are further…

A gunman opens fire at a local college, sending mass casualties to the hospital; Arizona’s return is not warmly received.

As preparations continue for Meredith and Derek’s wedding, Izzie receives a surprise hospital visit from her handful-of-a-mother, Robbie. Meanwhile, a newly sober Thatcher visits his daughters, Meredith and Lexie, in…

In the second part of the two hour season finale, George delivers stunning news to Bailey, sending shockwaves throughout the hospital, and Izzie’s friends anxiously await her recovery from surgery….

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…

Cristina meets Burke’s parents, the interns try to get Izzie’s job back, and Addison takes a day off, a surgical patient may be living her last day. Some of the…

A patient is in the hospital because they fell asleep in a hazardous situation. A patient’s home laboratory blew up in an apartment building and the victims flood the hospital….

Derek and Addison’s relationship is rocked to the core when a former friend comes to Seattle Grace and his presence promises to shake things up for a few members of…

After a series of deaths at the hospital some of the staff become very superstitious. Izzie worries about Denny and gets confronted by Alex. A patient with OCD drives Cristina…

Cristina Yang has little sympathy for Constance Ferguson (special guest star Rosanna Arquette), a prison inmate who jeopardizes her health just to get out of solitary confinement. Meanwhile the interns…

Train Wreck victims come to Seattle Grace and all staff gets called in. Everyone deals with really weird cases. Except Addison and Izzie. They work with a woman who is…