- Jonah Ain
- James Jones (US)
- Margaret Brock
- Bronwyn Jones (US) / Mrs. Chen (US) (voice)
- David Carling
- Station Officer Steele (UK) / Mike Flood (UK) / Trevor Evans (UK) / Chief Fire Officer Boyce (UK) / Tom Thomas (UK & US) (voice)
- Lily Cassano
- Mandy Flood (US) / Sarah Jones (US) / Lily Chen (US) (voice)
- Ifan Huw Dafydd
- Gareth Griffiths (UK)
- Su Douglas
- Mandy Flood (UK) / Helen Flood (UK) / Dilys Flood (UK) / Lily Chen (UK) (voice)
- John Hasler
- James Jones (UK)
- Andrew Hodwitz
- Fireman Sam (US) / Elvis Cridlington (US) (voice)
- Jacob James
- Charlie Jones (US)
- Steven Kynman
- Fireman Sam / Elvis Cridlington / Norman Price / Derek Price / Charlie Jones (voice)
- Scott Lancastle
- Mike Flood (US)
- Ashley Magwood
- Penny Morris (US)
- Joe Marth
- Dept. Fire Chief Boyce (US) / Gareth Griffiths (US) (voice)
- Dave Pender
- Fire Captain Steele (US)
- Michael Pongracz
- Trevor Evans (US)
- Becky E. Shrimpton
- Helen Flood (US)
- Sarah Lynn Strange
- Dilys Price (US)
- Carter Treneer
- Norman Price (US) / Derek Price (US) (voice)
- Tegwen Tucker
- Penny Morris (UK) / Sarah Jones (UK) / Bronwyn Jones (UK) / Mrs. Chen (UK) (voice)
- Nigel Whitmey
- Moose Roberts (UK & US)
