I was really worried when I heard that Callum Wharry was being replaced as Tommen Baratheon. Episode 3 of Season 4 finally introduces our new Tommen, now played by Dean-Charles Chapman. And he's [i]old[/i].

The whole point of Tommen is that he doesn't even understand what a king [i]does[/i], much less how to do it. He thinks the biggest extent of a king's job is to sign papers and seal them with wax, and he loves every bit of it. It's going to be a tough sell to pass a 15 year old off as that naive. 

*grumble grumble grumble*