I reckon the TARDIS must be related to the shopping trolley - it never goes where it's supposed to! This time the "Doctor" (Jon Pertwee) and his new pal "Sarah Jane" (Elisabeth Sladen) are planning some leisure time in the sun when they find themselves directed to a planet where technology doesn't work! That doesn't put folks off coming there though as it's the main source of the rare mineral "Parrinium" which has remarkable medical properties. When a ship full of "Daleks" arrives too - unable to exterminate anyone, an uneasy truce breaks out as they must ally themselves against the warrior-lik...