Narrator (voice)

Thomas (voice)

Edward / Henry / Salty / The Fat Controller / Harvey / Den / Various (voice)

Percy (voice)

Emily / Passengers / Mavis / Judy / Albert's Wife (voice)

Cranky / Dock Manager / Kevin (voice)

Carly (voice)

Workman / Diesel / 'Arry (voice)

Porter / Ryan / Dart / Paxton (voice)

Big Mickey / Sea Serpent / Toby (voice)

Sea Serpent (voice)

Daisy (voice)

Bert / Farmer McColl / Photographer (voice)

Sidney (voice)

Jerome (voice)

Henrietta (voice)

Troublesome Trucks (voice)

Angry Dock Worker / Philip (voice)

Victor (voice)

Porter (voice) (uncredited)