When two belligerent Dominators and their robotic servant Quarks land on the peaceful planet Dulkis planning to drop a radioactive seed into the planet's core to refuel their spaceship, the Second Doctor, Jamie and Zoe must attempt to inspire the pacifist Dulcians to resist.

Science Fiction, Drama, Adventure

Patrick Troughton, Frazer Hines, Wendy Padbury, Ronald Allen, Kenneth Ives, Arthur Cox