Annie, Troy and Abed try to help Britta avoid an old flame who has returned to town, while Jeff and Shirley set out to catch a glimpse of the mystery man. Elsewhere, Laybourne turns to Dean Pelton for help with his pursuit of Troy.

Derek introduces us to his world of retirees, autograph hunting and hamster videos. Hannah gets her first shot at romance in a long while and Dougie is busy fixing useless things.

A devastated Cristina presses Owen to confess the intimate details of his affair; Mark takes his new authority very seriously when he steps in as chief for the day and butts heads with Richard over a patient's liver transplant; and Callie deems Meredith ready for the boards, while the rest of the residents continue to stress about the exam. Meanwhile, Callie, Arizona and Bailey plan a much needed ladies night for Teddy.

Dave welcomes actor Billy Crystal and musical guests Alabama Shakes. In celebration of Dave's 65th birthday, Billy Crystal shares a special video he created for the occasion. Billy Crystal shares his great old showbiz story about comedian Red Foxx.

Olivia and her team must keep a DC madam's client list under wraps when she comes under investigation, leading to the firm protecting many of DC's most influential. Meanwhile, Quinn must continue to deal with the President's former intern.

Mitt Romney flips the "war on women" script with the help of Hilary Rosen, survivalist singles embrace online dating, and director James Cameron talks "Titanic 3D."

Episode info coming soon ..

Robert California forces the office to throw a welcome party for Nellie, but the Party Planning Committee works on ways to sabotage it. Meanwhile, Erin tries to help Andy figure out a way to break up with Jessica.