Aldo's Uncle Artie - S2.E16

Aldo is going out of town for a bowling tournament and needs someone to look after his blind Uncle Artie. Bill volunteers and he and Artie soon become friends. But when Artie says something about ducks that annoys Bill, Bill tells him he is a duck. Artie then tries to eat Bill, but Aldo comes back in the nick of time and saves Bill.