Thomas, Percy and the Post Train

Thomas, Percy and the Post Train is a Season 3 episode.Thomas and Percy are very busy pulling the mail train all over the Island. But one night the ship bringing the mail from the mainland is delayed, and as a result, Percy is late with the mail. Next night, Harold tells Thomas and Percy he's going to take over the mail run, much to their disappointment. They prove reliable though when they help a man who missed the last train home, and Sir Topham Hatt congratulates them. Harold however gets grounded because of the wind.