Donald's Duck is the fifth episode ever made in Season 3.
Duck has been working hard and as a reward, the Fat Controller gives him his own branch line. Duck gets conceited about his responsibility, until Donald loses patience and tells him he "quacks" like a duck laying an egg. Duck is furious and asks his crew to put a duckling in Donald's tank. Donald becomes attached to the duckling, but she soon jumps ship at Tidmouth Hault. Donald's crew, planning one last trick, put an egg in a box underneath Duck's bunker.
- The bridge Duck crosses with the trucks is on the line to Anopha Quarry.