The Doctor, Sarah Jane, and Harry return to Earth to help the Brigadier. They find the Loch Ness Monster, Zygons, and Scots. All this and we discuss the frugalness of the Scots and the power of puppetry.'
The Master returns with another dastardly plot (albeit a convoluted one) to disrupt World Peace. The Doctor unleashes Venusian martial arts while the UNIT gang break INTO prison.