While Jack helps Mike zero in on Calvin, Mel and Doc investigate a mysterious outbreak that could be related to food poisoning. Hope learns a secret.

Doc and Mel help Christopher and Preacher with a medical emergency. After an angry confrontation, Jack focuses his energy on a romantic gesture.

Jack makes a momentous decision as Mel grapples with how to share surprising news. Doc is plagued with concern. Preacher meets with Paige's friend.