Clayton is a crane who lives at the container terminal under Benjamin Bridge. He has a giant grabbing arm that is used to lift containers on and off of ships. Clayton is usually very nice, and is a good friend of the tugboats. There was once a time that Theodore wanted to be a harbour crane just like Clayton but then learned that even though they're different they are both good at what they do. In most episodes Clayton does not have a face.
- Season 5 - Theodore and the Harbour Crane, Theodore and the Scared Ship, Hank and the Sunken Ship (cameo), Bedford's Big Move (cameo), George and the Flags, Guysborough Makes a Friend (cameo), Hank Floats Forward, and Pugwash is Gone!
- Clayton's model is currently on display at the Maritime Museum of the Atlantic.
- Before his introduction, a faceless gantry crane was on his space.
- Clayton's Brio Model is based on the Brio overhead crane introduced the same year.
- Brio (retired)