Fireman Sam is a fireman who works for the Crotoonian Fire And Rescue Squad.
The proclaimed 'hero next door', Sam is a competent, modest and brave firefighter, who helps Jackman, Flynn, Belle and Asher put out fires in Crotoonia. He considers his job to be 'the best job in the world', and even on days when he isn't doing work, he will always offer to help when there's a fire about. However, he does have an inventive streak which sometimes gets him in trouble when one of his inventions goes haywire. Nevertheless he is selfless, putting his life on the line to help others. Everyone knows that nothing is too much trouble for Fireman Sam. Even when he's really surprised and he exclaims, "Great Fires of London!", he keeps a cool head in an emergency.