NCIS investigates the death of a ride-share driver who was found after a car accident. Also, Parker’s dad, who is temporarily living with him, assists the team in their investigation.

Zach is making up for lost time in Tallinn, Estonia, where he tests the strength of one connection in a friendly local competition and steps out of his comfort zone at a nude sauna; an Estonian witch works her magic to help him find love.

When a 3-year-old arrives at the ER, the team immediately recognizes he is having a stroke. However, Dr. Shaun Murphy’s diagnosis of the underlying cause doesn’t solve the problem which has Dr. Park search deeper.