Henry GoldingNarrator (voice)

Harry SparkesThomas (voice)

Rowan AlltraineKid A (voice)

Rory BarnettFarmer McColl / Engineer (voice)

Django BevanGordon (voice)

Iliana Vargas BrockRosie (voice)

Oscar ElliottPercy (voice)

Jenny FitzpatrickWoman (voice)

Gene FoadSir Topham Hatt (voice)

Elliott GarciaBruno (voice)

Nanak PhloraDeepak (voice)

Greta RailtonKid B (voice)

Chris WoodworthHenry (voice)