Fireman Sam: Set for Action!

I understand why they have done what they have done but when you have granddaughters who live watching the show suddenly burst into tears because there hero character, (yes even at 3&5 years old) is not going to be a fireman anymore. I then have to spend ages trying to tell them that it's just a film and he will be a fireman again then I think you need to look at the wider picture there are probably thousands of people had the same problem. Yes I understand why it was made that way but come on its a small children's animated program. They don't understand sabotage and I don't really want to be explaining it to a 3yr old