Driscoll (The Hand of Fear)

Driscoll was an employee at the Nuton Power Complex. Driscoll was a member of an armed radiation team sent to get Sarah Jane Smith out of the fusion room. When the team couldn't get through the doors, the Fourth Doctor found a way in through the cooling duct. After Sarah was removed from the fusion room, Driscoll returned to remove Eldrad's hand for examination and containment. The Doctor noticed that Eldrad's ring was missing and Sarah, barely able to remember anything, didn't know anything about it either. Driscoll volunteered to go back in and search for it. When he did, he too was taken over by the ring's influence. When asked, he said he had found nothing.

In decontamination, he knocked a man unconscious, took Eldrad's hand and headed for the reactor core. When the Doctor realised that he must have been taken over, he set out in pursuit of him and told others to stop him as well. They were unsuccessful. Driscoll used the power of the ring to blast down the guards sent after him. Entering the fusion room, he unlocked the door to the reactor core and went in with the hand. He was no doubt vapourised — sacrificed for the sake of Eldrad's regeneration. (TV: The Hand of Fear)