Mark Moraghan as Narrator (UK & US) (voice)

John Hasler as Thomas (UK) (voice)

Joseph May as Thomas (US) (voice)

Darren Boyd as Theo (voice)

Sophie Colquhoun as Frankie (voice)

Hugh Bonneville as Merlin (voice)

Lucy Montgomery as Lexi (voice)

Jim Howick as Hurricane (voice)

Colin McFarlane as Beresford (voice)

Rasmus Hardiker as Philip (UK & US) (voice)

Keith Wickham as Edward, Henry, Gordon and the Fat Controller (voice)

Nicola Stapleton as Rosie (UK & US) (voice)

Teresa Gallagher as Emily (UK), Annie and Clarabel (UK & US) (voice)

Rob Rackstraw as James (UK & US), Toby (UK), Troublesome Trucks (UK & US) (voice)

Christopher Ragland as Percy (US), Troublesome Trucks (UK & US) (voice)

Jules de Jongh as Emily (US) (voice)

Nigel Pilkington as Percy / Trevor (voice)

John Schwab as Ulli / Other Mainline Diesel (voice)

Steven Kynman as The Knapford Station Worker / Steelworks Worker (voice)

David Bedella as Victor (voice)

Kerry Shale as Kevin / Troublesome Trucks (voice)

William Hope as Farmer McColl (voice)