Duck is a Great Western engine.
- Season 1 - Mother's Day, The Donut Sneakers, No Rules Rule or New Friend, Cousin Neville, Spencer In Trouble, Bill and Ben (cameo), James and Duck, Good Morning, Train Safety Tips 1: Stay Alive, and Holiday Mess-Up,
- Season 2 - Gordon Returns (cameo), The Bully (cameo), and James's Wishes (cameo)
Friends: Thomas, James, percy, Emily, Bill and ben, Henry, and Sir topham hatt
Enemies: James ( Formley ) and Diesel 10