Based on a story from the BBC TV serial "Doctor Who". Scientist Dr. Who accidentally activates his new invention, the Tardis, a time machine disguised as a police telephone box. Dr. Who, his two grand-daughters, and Barbara's boyfriend Ian are transported through time and space to the planet Skaro, where a peaceful race of Thals are under threat of nuclear attack from the planet's other inhabitants: the robotic mutant Daleks.