- "Love is so weird..."
- ―The Small Controller, Swashbuckler
The Small Controller
- First Appearance: Lift Bridge (cameo), Search Party
- Affiliations: The Arlesdale Railway
- Friends: Mike, Rex, Bert, Frank, Jock, The Fat Controller, The Thin Controller, Walter Richards, Jenny Packard, Roxanne Sam
- Enemies: Sir Frederick Aura, Walter Sliggs, Carlo Debris, Dex and Winslow
- Voiced By: Michael Evans
The Small Controller is the manager of the Arlesdale Small Railway. He is the nephew of Sir Francis Duncan, the original controller. His full name is Fergus Duncan.
The Small Controller has been working very close to the Little Western Extension Project, as the vast and expansive bridge towers over the Arlesdale Wool Route. He is also in charge of supplying a great deal of the North Western Railway's Ballast. He is a remarkable businessman, usually composed, thoughtful, and thrifty, but can be thrown off balance when he acts out of impetuousness. He also, of his own words, has not made any moves on the "dating scene" for quite some time.
He once joined a search party to help rescue a lost sheep in the dark, When Mike and Frank were introducing themselves to Sidney, he was seen near a warehouse talking to a firefighter. He later was seen at The Flying Scotsman's welcome party, and later at the Crovan's Gate Works.
He was present at the Skarloey Railway's production of Hamlet, but thought it was a ballet recital!
He was called to the meeting about the Little Western Extension, going with The Thin Controller. During the rebellion of Carlo Debris' workers, he was attacked, but was saved by Miss Jenny Packard, prompting him to call her "enchanting".
- Season 1: Lift Bridge (cameo), Search Party, Sidney (cameo), Conspiracy Theory (cameo)
- Season 2: Two Hearts Burn Together (cameo), Scot-free (cameo), Waterworks (cameo), James Goes on a Trip (cameo), Rock-Star (cameo), Blunderbuss (cameo), All the World's a Stage (cameo), Swashbuckler
- Web Clips: Rex, Bert, Mike and Frank - Meet the Characters!, Mike and Frank Banter, SLOTLT, ScarletFire, and EE93's Return (cameo)