Duncan is the no.6 yellow narrow gauge engine.
- trainlover476 [Season 1]
- NCStL576 [Season 2]
- FlameAmigo619 [Season 3 onwards]
Season 1--- Edward's Big Mess-Up and Percy on the Run [cameo]
Season 2--- A Shade of Orange, Christmas, and Thomas in Love
Season 3--- 150th video-verrsery [cameo], Gameshow Carnival 2: Roof-top Stranded [cameo], and Trimag x TOMY Thomas and Friends Crossover