Look out, Addison’s back at Seattle Grace. But it’s only temporary. She's in town because her brother, Archer, needs help from the best neurosurgeon she knows. Of course, said neurosurgeon just happens to be her McDreamy ex-husband.
Archer has parasites in his brain. We know. It’s gross. They’re living in little sacks of fluid. It’s just about impossible to remove the sacks without puncturing them. Doing so would send all the little worms scurrying into Archer’s brain. Told ya it was gross.
And at first, Derek doesn’t think Archer’s case is operable. Sam, one of the other doctor’s from Oceanside Wellness, comes up with the idea of suctioning the sacks to drain them before removing them. Derek thinks it might work. It’s also Archer’s only shot. The surgery is a success and Derek is a hero.