This might have had a touch more menace to it, had the eponymous creatures bent on Earth's conquest not looked like the famous yellow-coats at a seaside holiday camp. Anyway, they are the chosen implements of the malevolent "Master" (Roger Delgado). He has returned to assist the powerful "Nestene" with their dastardly plans but hasn't counted on the intervention of the "Doctor" (Jon Pertwee) and his UNIT ally the "Brigadier" (Nicholas Courtney) who are intrigued when a secret power unit is stolen; then a radio telescope is put out of action and bodies start popping up all over Britain seemingly... read the rest.