Stephanie Childers

Meredith, Cristina, Izzie and Alex spend their first day as residents with their own interns, including George, repeating his internship after failing his exams, and Meredith's half-sister. Cristina searches for Burke, who is nowhere to be found and Richard resumes his position as chief of surgery.

When a subway train is thrown off the track by 60,000 gallons of flood water, a partially skeletonized body emerges out of the overflow. While Dr. Sweets, a passenger on the derailed train, copes with post traumatic stress, the rest of the team and intern Daisy Wick (guest star Gallo) get to work on identifying the victim as Martin Aragon, a professional ghost writer caught up in a deadly love triangle. Meanwhile, Brennan releases her second book to great success, but has to accommodate a nosy reporter, and Sweets’ near-death experience leads him to make a drastic decision.

Just as Violet's personal life takes a turn for the better with Scott the paramedic, Joanna arrives in need of urgent medical attention, being both pregnant and badly beaten.

Ignoring orders from Homeland Security, the team searches for Bodnar in order to avenge the murders of Eli David and Jackie Vance.

Much to the chagrin of the County General staff, the new Chief is ready to make some major changes in the ER. Meanwhile, Kovac puts his honeymoon on hold while he travels back to Croatia to be with his ailing father, Gates is urgently called home when Sarah panics that she might be taken away, and a patient convinces Neela to attend an anti-war rally and consequently finds her life in peril.