Duck is the no.8 green Great Western tank engine.
- Season 1 - Crossed Lines, High-Speed Gordon (cameo), Old Stuck Up (cameo), and Drip Tank (cameo)
- Season 2 - The Missing Coach (does not speak), Triple Header, and Gordon Goes Foreign
- Season 3 - Domeless Engines, Thomas and the Evil Diesel, Little Old Twins (cameo), and The Runaway (does not speak)
- Season 4 - The Deputation, Pop Goes the Diesel, A Blast from the Past, Light Work (cameo), Dirty Work, Diesel's Big Idea (cameo), James and Murdoch, and Winter Mischeif (does not speak)
- Season 5 - Sitting Ducks, Henry Sees Red (cameo), Little Western, and Stepney's Special (does not speak)
- Season 6 - Oliver in Charge (cameo), Ballast, Resource and Sagacity, Skarloey Remembers (cameo), and Donald's Duck
- Season 7 - A Close Shave and Percy's Porridge (does not speak)
- Season 8 - Edward's Exploit, Mike's Whistle (does not speak), and Toad Stands By
- Season 9 - Desperate Measures (mentioned), Limits, Tolerance, Old Tricks, Sir Handel (music video cameo), Percy's Predicament (music video cameo), Duck Takes Charge
- Season 10 - Down the Mine (music video cameo), Percy's Promise (music video cameo), Tenders for Henry, Mind That Bike, (cameo), Thomas Goes Fishing (music video cameo), Henry and the Elephant (music video cameo), The Fat Controller's Engines, Thomas Comes to Breakfast (music video cameo), Bowled Out, Train Stops Play (cameo), Better Late Than Never (music video cameo), Percy and the Signal (music video cameo)
- Buzz, Buzz, Rock 'n' Roll (cameo), Percy Takes The Plunge (cameo), Cows! (cameo), Saved From Scrap (cameo), Old Faithful (cameo), Paint Pots And Queens (cameo)
- Thomas And The Rumours (cameo), Fish, Woolly Bear (cameo)
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