• 
  John Hasler

  Thomas (UK) (voice)
• 
  Joseph May

  Thomas (US) (voice)
• 
  Mark Moraghan

  Narrator (UK & US) (voice)
• 
  Kerry Shale

  Gordon (US) / Diesel (UK & US) (voice)
• 
  Keith Wickham

  Gordon (UK) / Sir Topham Hatt (UK & US) (voice)
• 
  Rasmus Hardiker

  Philip (UK & US) (voice)
• 
  Steven Kynman

  Paxton (UK & US) (voice)
• 
  Jonathan Broadbent

  Bill and Ben (UK & US) (voice)

• 
  Teresa Gallagher

  Emily (UK) / Annie & Clarabel (UK & US) (voice)
• 
  Bob Golding

  Stephen (UK & US) (voice)
• 
  Rob Rackstraw

  Axel (UK & US) (voice)
• 
  Joe Mills

  Donald and Douglas (UK & US) (voice)
• 
  Nigel Pilkington

  Percy (UK) (voice)
• 
  Christopher Ragland

  Percy (US) (voice)
• 
  Tina Desai

  Ashima (voice)

• 
  William Hope

  The Dock Manager (US) (voice)
• 
  David Menkin

  Porter (US)
• 
  Rufus Jones

  The Flying Scotsman (UK & US) (voice)
• 
  Jules de Jongh

  Emily (US) (voice)
• 
  Jonathan Forbes

  Connor (UK & US) (voice)
• 
  Olivia Colman

  Marion (UK & US) (voice)
• 
  David Bedella

  Victor (UK & US) (voice)