The real Mad-Eye Moody was at the staff table now, his wooden leg and his magical eye back in place. He was extremely twitchy, jumping every time someone spoke to him. It turned out that the one teaching them was actually Barty Crouch Jr in disguise, and the real Moody was locked in a trunk the entire year. Rita had a scathing article on Dumbledore for not realizing it was Crouch.