Donald Dock is the wooden dock across from The Dispatcher, and also happens to be his best friend. Donald is special because he only uses the words "uh-huh" and nothing else. The Dispatcher and the tugs sometimes go to him for advice and usually get the right answer from him.
- Season 1 - Theodore and the Oil Rig (cameo), Foduck the Vigilant (cameo), True Blue Friends (cameo), Bumper Buddies (cameo), The Day Ice Came to the Harbour (does not speak), Theodore's Bad Dreams (cameo), George Buzzes the Dock and The Great Harbour Clean Up Contest.
- Season 2 - Theodore Changes Sides (cameo), Snorri the Viking Ship, Foduck Stays Home (cameo), Theodore the Jokester (cameo), and Theodore's Day Off
- Season 3 - A Joke Too Far, Hank's Hiccups, Hank's New Name (cameo), Big Harbour Birthday, Theodore's Backwards Day (cameo), Emily's New Hat (cameo) and Theodore and the Missing Barge (cameo)
- Season 4 - George and the Flags
- Season 5 - Hank Hurts a Ship (cameo), Hank and the Sunken Ship, and Theodore's Bright Night (cameo)
- His name is a reference to Donald Duck.
- Donald's model is currently on display at the Maritime Museum of the Atlantic.
- ERTL (discontinued)