George Philips

Professor George Philips was a scientist who worked at a British radio telescope. The Master took control of him as part of his scheme to bring the Nestenes to Earth. He later ordered Philips to kill the Third Doctor with a Sontaran fragmentation grenade, but he broke free of the Master's control and took the brunt of the explosion himself, saving the Doctor's life at the cost of his own. (DW: Terror of the Autons)