S1·E26 Fistful of Mail!
Aired December 10, 1998
Synopsis
Dog meets up with a paperboy faster than him. This agravates him, and he trys everyday to get faster. When he realizes that he won't ever be, the former mailmen make a disgrase of him. Then...he relizes that the mailman is a person who has been faster since childhood, and he goes faster than him.