Ep 13. The Mud Bog Match-Up / Dino Dig

In "The Mug Bog Match-Up," Sparky thinks her new tires make her invincible, but when she ignores directions and pushes her tires too hard, she learns that even the best gear has its limitations. In "Dino Dig," Dug thinks that whatever he unearths is his for keeps, but when he unearths a dinosaur bone on a dig he learns that some things need to be shared.