Ep 8. Shaking in His Treads / The Big Sign Smash

In "Shaking in His Treads," when Dug is warned not to go up hills that are too steep, he's afraid to go up a hill to complete a job. In "The Big Sign Smash," the Terrific Trucks have had enough of Sparky's messy ways when a piece of metal debris she leaves lying around pops Stotz's tire!