Narrator

Kim Seung-jun

Narrator (voice)

Mark Moraghan

Thomas / Rheneas (voice)

John Hasler

Thomas

Shin Yong-woo

Ashima

Tina Desai

Thomas

Joseph May

Edward / Henry / Gordon / James / Salty / Den / Norman / Skarloey / Sir Handel / The Fat Controller / Various (voice)

Keith Wickham

Victor / Carlos (voice)

David Bedella

Edward

Um Sang-hyun

Gordon

Jeon Tae-yeol

Emily (singing voice) (uncredited)

Jules de Jongh

Percy (voice)

Nigel Pilkington

Harvey

Baek Kyung-hoon

Connor

Jonathan Forbes

Philip (voice)

Rasmus Hardiker

Duck / Charlie / Porter / Dart / Paxton / Peter Sam (voice)

Steven Kynman

Emily

Kim Eun-a

Emily

Teresa Gallagher

Donald / Douglas / Oliver (voice)

Joe Mills

The Flying Scotsman (voice)

Rufus Jones

Bill / Ben (voice) (uncredited)

Jonathan Broadbent*

Samson / Great Railway Show Judge (voice)

Robert Wilfort

Rex (voice) (uncredited)

Tom Stourton

Vinnie (voice)

John Schwab

Scruff / Diesel (voice)

Kerry Shale

Stephen / Sidney (voice)

Bob Golding

William Hope

Caitlin (voice)

Rebecca O'Mara

Timothy / Mike (voice)

Tim Whitnall

David Menkin

Axel / Raul / Carlos / Ivan / Etienne / Flynn / Great Railway Show Announcer (voice)

Rob Rackstraw

Percy (singing voice) (uncredited)

Christopher Ragland

Matt Wilkinson

Glenn Wrage