When the NCIS team engages in Walk-a-Mile day to gain a new perspectives on different departments, things take a turn when Kasie receives a distress call from a mysterious man.

NCIS works with the CIA to discover what secrets are being kept by Captain Butler, an elderly former spy with dementia.

McGee's career and credibility are on the line when he investigates the deputy director for corruption; Torres and Knight receive some surprising news.