Adventures in Odyssey: The Knight Travellers (1991)

When Dylan stumbles onto the thieves who stole the Imagination Station from Mr. Whittaker's home, he is drawn into an adventure that takes him back in time to the Dark Ages. There he must defeat the evil Mr. Faustus in a joust. Faustus has stolen the Imagination Station and reprogrammed it to manipulate peoples minds so that Faustus can control the world.