Grimlock discovers another Dinobot fugitive named Scowl with whom he sympathizes. He helps them flee, but it does not take long to destroy everything and terrorize the humans as Grimlock is unaware that Scowl was a hired muscle of Thunderhoof. Our heroes will have to join forces to stop Scowl. Meanwhile, Denny redecorates a motor home and Russell is afraid of what his father made.