John Hasler

Thomas (voice)

Keith Wickham

Edward / Gordon / Harvey / Salty / Harold / The Fat Controller / Glynn / Various (voice)

Rob Rackstraw

James / Toby / Bernie / Professor Friedrich (voice)

Nigel Pilkington

Percy (voice)

Teresa Gallagher

Emily / Annie / Clarabel (voice)

Nicola Stapleton

Rosie (voice)

Yvonne Grundy

Nia (voice)

Rachael Louise Miller

Rebecca / Dr. Hetty (voice)

Joe Swash

Sonny (voice)