Newsround has made a special programme all about bullying. It's called Whose Side Are You On? and is set in a made-up school. On the left is the main character Jack.
Jack, on the left here, is played by an actor called Tom. The other boy is Brandon, who plays Liam in the programme. In the show Liam is having a bad time with bullies.
A lot of the action is set in the school Liam and Jack both go to. Jack is trying to stay out of the bullies' way, which means he isn't as good a friend to Liam as he should be.
Filming isn't all about cameras, sets and actors though. Lot of other people help out behind the scenes to make sure everything works out as it ought to.
These green sheets are really useful. Once we've filmed with them in the background, we use computers to add in other clips in place of them. In this case, George Sampson posters.
The crew had to spend a lot of time filming at the school. Although it's got a made-up name and uniform it does exist, in Crawley in West Sussex.
To make the scenes inside classrooms look real we needed to use other children to sit in the room with our main actors. They're called extras.
But most of the filming was still of Tom, playing Jack. He's got a lot of thinking to do during the special.
And here's the team behind the camera. As you can see there are quite a few of them, and they use lots of notes to make sure everything is done just right. And cups of coffee!
Now you may have seen people do this in TV programmes, but this proves it does happen for real too. It helps the cameraman frame his shots.
Maybe Tom fancies stepping behind the camera at some point in the future? He seemed to spend a lot of time looking down the lens.
And here's the team using those green screens again. This time it's for Aston from JLS so he can appear to move out of a magazine cover on a red carpet.
And here's the red carpet inside the classroom. Later the two bits of film will be edited together to fit into the finished programme.