Night of the Living Burger

S1 E2: Mr. O'Greasy, the sleazy proprietor of fast-food emporium O'Greasy's Bucket O' Restaurant, enlists the aid of the Scooby-Doo gang to catch the Living Burger, who attempts to put the restaurant out of business. Since O'Greasy sponsors the kids' favorite TV horror program, Scooby and the gang agree to help. But the difficult mission grows worse when a fighting Scooby and Shaggy refuse to speak to each other.