Steven mentioned the fez to Piers [Wenger] and I before he even wrote it. He said, “I’m thinking of putting Matt in a fez in episode 13.” And of course both Piers’ and my jaws hit the floor and went “A fez? You’re kidding me, you’re going to put Matt in a fez? If we put Matt in a fez, Matt will never take the fez off. He will want to wear the fez for the whole of the next series. It will be glued to his head. He’ll be wearing it, you know, with his own clothes. It will be a nightmare.” And he said, “No no, I’ve got a cunning plan; as soon as he’s got the fez I’m going to kill the fez.”
— Beth Willis, Doctor Who producer