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.

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

Genre:Science Fiction, Drama, Adventure,

country:United Kingdom,

Production:BBC,