About this episode
When a surprise guest visits H.G. Wells Middle School in advance of the all-important GFT test, the exhilaration of Mars and his friends turns to horror as Mars starts a fight he may not be able to finish. This Peabody Award-winning serial mystery is beloved by families and classrooms all over the world. For more great shows, visit GZMshows.com . Learn more about your ad choices. Visit megaphone.fm/adchoices See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info .