Ep 4. The Ribos Operation (4)

The Fourth Doctor and his companion Romana are sent by the White Guardian on a mission to find the first segment of the Key to Time, which has been split into six pieces and scattered throughout the universe. They arrive on the planet Ribos, where they encounter two con men who are trying to sell a fake valuable mineral called jethrik to the local tyrant, the Graff Vynda-K. The Doctor and Romana become involved in the scheme when they are mistaken for the con men and are forced to help them in their plan. Meanwhile, a mysterious figure known as the Seeker is also on Ribos, searching for something that seems to be connected to the Key to Time. As the Doctor and Romana navigate the political intrigue of Ribos, they must also figure out the true nature of the Seeker and prevent the Graff from acquiring the real jethrik, which could potentially destroy the universe. The episode is full of witty banter, clever twists, and a unique setting that blends elements of medieval and science fiction. It also introduces several memorable characters, including the charming con men Garron and Unstoffe, and the menacing Graff Vynda-K. Overall, The Ribos Operation is an entertaining and delightful adventure that showcases the Fourth Doctor's playful and adventurous personality.