Broken
performed by Jake Bugg

The CDC comes to the hospital to investigate the post-op infections in Dr. Bailey's patients. Tensions flare when Jackson doesn't side with the rest of the board in supporting Dr. Bailey. Meredith wants Cristina present during her labor. Matthew asks April to give him a second chance. Alex admits to Cristina that he loves Jo. The CDC investigation concludes that the cause of the infection is in the surgical gloves used during Dr. Bailey's surgeries.

Sherlock, while suspended from consulting for the NYPD, can't resist investigating the death of a conspiracy theorist.