Hilda Winters was a member and leader of the Scientific Reform Society, a group secretly planning to take over Earth.
Biography
Winters invited Sarah Jane Smith to see the Experimental Prototype Robot K1. She demonstrated its inability to kill by asking it to terminate Sarah's life. The robot became confused, claiming that such an order conflicted with its prime directive. Winters was later seen at the Scientific Reform Society meeting, bringing out Professor Kettlewell outside, along with the robot. She retreated with the SRS to their bunker, from which they attempted to override the nuclear missile codes of all nations to create a nuclear holocaust. Her plans were thwarted by the Fourth Doctor's interference. (DW: Robot)
After serving fifteen years in prison for her crimes, Winters encountered Sarah Jane again. (BFSJS: Mirror, Signal, Manoeuvre)