Christine Avila

When Cuddy's handyman, Alfredo, falls from her roof and develops strange symptoms, she joins the team to figure out what is wrong with him.

Holly pushes Saul and Sarah to their limits; Kevin encounters prejudice in the workplace for the first time; Justin struggles with a hero's welcome from a soldier he saved in Iraq.

As Adam (Sean Giambrone) goes to great lengths to avoid swimming at school, jealousy prompts Barry (Troy Gentile) to undermine Erica’s (Hayley Orrantia) effort to make the world a better place.

Captain Raydor (recurring guest star MARY McDONNELL – Battlestar Galatica) accompanies Brenda on an investigation involving the disappearance of a nanny working for close friends of the mayor. Meanwhile, Raydor's real purpose in taking part in the investigation could have big career implications for Brenda.

A teen who painted graffiti in Little Italy is slain; Donna makes a decision about her relationship with Medavoy; Sylvia is mugged.

Dr. David Morgenstern (WILLIAM H. MACY) takes a trip down memory lane as he stops by County General and Sam's sister (SHANNON WOODWARD) pays an unexpected visit.