Mollis

 was the governor of Triketha. He was concerned about the Toraxians on the planet. He saw that an accident was the reason they were there on the planet and didn't like it. When he learnt that the Toraxian's wanted to convert him people in themselves. Edwin told him not to trust the Sixth Doctor, so thought he was working against them. He found some proof of wrongdoing but it was actually his wife Dresha that did it. (AUDIO:Colony of Fear)