Charlie Koznick

As part of their training, Seattle Grace's residents are put in charge; the attending surgeons compete for a million dollar grant.

While touring Hearst College with Wallace, Veronica is stunned to run into her shady ex-boyfriend Troy Vandergraff (recurring guest star AARON ASHMORE). But the real surprise comes when Troy is accused of date rape on campus and calls Veronica for help. Meanwhile, Logan's legal troubles and his relationship with Hannah (recurring guest star JESSY SCHRAM) both reach important turning points. Later, after receiving a call for help, Keith arrives at a hotel and finds his attorney buddy Cliff (DARAN NORRIS) in a compromising position. MICHAEL CERA and ALIA SHAWKAT (both of "Arrested Development") guest star as Hearst College students Dean and Stacy.

After Dean O'Dell reinstates the Greek system on campus, Veronica remains determined to solve the rape case. Along with Mac, Wallace and Piz, she attends a party armed with coasters designed to test for drugs in the drinks of her peers. Meanwhile, Dean O'Dell hires Keith to investigate whether or not O'Dell's wife is cheating on him.

The CSIs recreate a night of bachelor party debauchery in order to solve a murder and find a missing groom.

When a frazzled mother, Lillian, bursts into the Philadelphia Police Department claiming to know who might have killed her daughter at a 1968 debutante ball, Rush reopens the case. Lillian begs Rush and the team to search for her daughter's killer when a newspaper story reports on a man pushing his wife down the stairs.