Jorge Cordova

When the number comes up on a promising young doctor, Megan Tillman (guest star LINDA CARDELLINI), Reese and Finch must unravel the threat while she's on-call and after hours.

Danny receives a chilling message from a possible serial killer. Erin considers applying for a judgeship, and mayoral candidate Katherine Tucker believes Frank is secretly investigating her husband.

After the Turkish government releases a potentially damaging video, Elizabeth must mend political relations; Jason punches a school bully.

Hank and Divya are concerned about Mac's increasingly unusual behaviour when his wife comes in for treatment on her ankle, and become aware of their marital issues. Evan is asked to stand-in as a patient's boyfriend when she does not want her parents to find out her partner's true age.