Ken Barnett

A mystery woman sabotages Barney's love life, and to try to figure out who she is, Barney creates his own set of tournament brackets to decide which of 64 women has the most cause to hate him.

Ari scrambles to keep the approval for Billy's script; Eric manages a new client and her boyfriend.

Lt. Disher inherits his uncle's farm, but suspects that he may not have died of natural causes.

Addison returns to Seattle Grace to perform an operation and is surprised by all the changes in the lives of her former co-workers; Derek and Meredith's clinical trial has its first patient; Rebecca returns with shocking news for Alex.

Mary must protect her least favorite witnesses on the day of her sister's wedding.

While under FBI surveillance, Mary must lose her tail and find her father to clear her name.