It’s Halloween at Grey + Sloan Memorial Hospital, and things are getting creepy! A delusional, psychotic drug addict, who has a condition where his heart is on the opposite side of his chest, makes his way into the ER after he was shot multiple times because he was eating the face of another patient; Jackson and April work together to repair the patient’s face injuries. A ghost-like patient of Dr. Brooks finds herself in need of help, but she demands that she’ll only see Dr. Brooks until Shane tells her Brooks is dead. Cristina and Owen team up to do surgery on the zombie-like drug addict, and they find out that they can be in the same room together as long as they don’t overcomplicate it. Alex and Jo are on another Peds case and save a little girl from being literally “scared to death.” Webber kicks Bailey off his case, and he reappoints Meredith—after an apology of course—and tells her he wants her to help him teach the 2nd year residents. Ben returns to surprise Bailey and Tuck for Halloween, and while repairing Zola’s costume, Ben gives Shepherd an idea for his research. Ben later springs it on Bailey that he has dropped out of his residency to spend more time with her. Leah and Arizona get closer as they share their common fear of contracting diseases from patients.