S3 E4: Discovery

Mars goes exploring and stumbles upon someone close to him… as his friends on the red planet make a universe-changing discovery.This Peabody Award-winning serial mystery is beloved by families and classrooms all over the world. For more great shows, visit GZMshows.com.See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.