- Mark Moraghan
- Â Narrator / ... 75 episodes, 2020-2021
- Keith Wickham
- Â Sir Topham Hatt (UK & US) / ... 51 episodes, 2020-2021
- Joseph May
- Â Thomas (US) / ... 45 episodes, 2020-2021
- John Hasler
- Â Thomas (UK) / ... 43 episodes, 2020-2021
- Kerry Shale
- Â Gordon (US) / ... 36 episodes, 2020-2021
- Teresa Gallagher
- Â Emily (UK) / ... 36 episodes, 2020-2021
- Rob Rackstraw
- Â James / ... 27 episodes, 2020-2021
- Matt Wilkinson
- Â Cranky (UK) / ... 25 episodes, 2020-2021
- Nigel Pilkington
- Â Percy (UK) / ... 23 episodes, 2020-2021
- Christopher Ragland
- Â Percy (US) / ... 23 episodes, 2020-2021
- Rachael Louise Miller
- Â Rebecca (UK & US) / ... 21 episodes, 2020-2022
- Jules de Jongh
- Â Emily (US) / ... 19 episodes, 2020-2021
- William Hope
- Â Rocky (US) / ... 16 episodes, 2020-2021
- Glenn Wrage
- Â Cranky (US) / ... 12 episodes, 2020-2021
- Ben Small
- Â Thomas (UK) / ... 12 episodes, 2020-2021
- Martin T. Sherman
- Â Thomas (US) / ... 10 episodes, 2020-2021
- Mike Grady
- Â Sir Robert Norramby (UK & US) / ... 7 episodes, 2020-2021
- Yvonne Grundy
- Â Nia (UK & US) / ... 7 episodes, 2020-2021
- Steven Kynman
- Â Porter / ... 6 episodes, 2020-2021
- Bob Golding
- Â Sidney (UK & US) / ... 5 episodes, 2020-2021
- Lucy Montgomery
- Â Carly / ... 4 episodes, 2020-2021
- David Bedella
- Â Victor (UK & US) / ... 4 episodes, 2020-2021
- Togo Igawa
- Â Hiro (UK & US) 4 episodes, 2020-2021
- Rebecca O'Mara
- Â Caitlin (UK & US) / ... 4 episodes, 2020-2021
- Jonathan Forbes
- Â Connor (UK & US) 4 episodes, 2020-2021
- Olivia Colman
- Â Marion (UK & US) 3 episodes, 2020-2021
- Tim Whitnall
- Â Reg (UK & US) / ... 3 episodes, 2020-2021
- David Menkin
- Â Porter (US) / ... 3 episodes, 2020
- Sheena Bhattessa
- Â Charubala (UK & US) 2 episodes, 2020-2021
- Nikhil Parmar
- Â Rajiv (UK & US) 2 episodes, 2020-2021
- Joe Mills
- Â Oliver (UK & US) / ... 2 episodes, 2020-2021
- Chipo Chung
- Â Hong-Mei (UK & US) 2 episodes, 2021
- Dan Li
- Â Yong Bao (UK & US) 2 episodes, 2021
- Maggie Ollerenshaw
- Â Henrietta (UK & US) 2 episodes, 2021
- Michael Legge
- Â Luke (UK & US) 2 episodes, 2021
- Rose Robinson
- Â Tamika (UK & US) 2 episodes, 2021
- Siu-see Hung
- Â AnAn (UK & US) 2 episodes, 2021
- Windson Liong
- Â Yin-Long (UK & US) 2 episodes, 2021
- Tariro Mavondo
- Â Ranger Jill (UK & US) 2 episodes, 2021
- Miranda Raison
- Â Millie (UK & US) 1 episode, 2020
- Shane Jacobson
- Â Shane (UK & US) 1 episode, 2020
- Jonnie Broadbent
- Â A Slip Coach (UK & US) 1 episode, 2020
- Genevieve McCarthy
- Â Aubrey (UK & US) 1 episode, 2020
- Tim Bain
- Â Aiden (UK & US) / ... 1 episode, 2020
- Ian McCue
- Â The Blue Sea Serpent (UK & US) 1 episode, 2020
- Tracy-Ann Oberman
- Â Daisy 1 episode, 2021
- Rasmus Hardiker
- Â Philip 1 episode, 2021
- Tom Stourton
- Â Terence (UK & US) 1 episode, 2021
- Nicola Stapleton
- Â A Child (UK & US) 1 episode, 2021
- Dominique Moore
- Â Ruth (UK & US) 1 episode, 2021
- Mia Hope
- Â A Child 1 episode, 2021
- Sharon Miller
- Â Queen Elizabeth II (UK & US) 1 episode, 2021
- Charlie Barnard
- Â A Child 1 episode, 2021
- Jessica Hann
- Â A Child 1 episode, 2021
- Holly Hazelton
- Â A Child 1 episode, 2021
- Innis Robertson-Pinnell
- Â A Child 1 episode, 2021
- Doc Denton
- Â A Child 1 episode, 2021
