Jonathan Jaggers

 was a showman who employed Kybo to be part of his circus. As part of his show he got people to fight Kybo. When the Sixth Doctor came to free Kybo, he knocked him out and put him in a cage. When the rest of the Judoon came to find Kybo, he obstructed their work then attacked the Judoon commander who then executed Jonathan. (AUDIO: Judoon in Chains)