Doctor Who: The Ribos Operation (1978) is a Science Fiction, Adventure, Drama film that follows the Doctor is summoned by the mysterious and powerful White Guardian, and sent on a quest to find the six segments of the Key to Time, which, once assembled, will restore balance to the Universe. Joining the Doctor and K9 is the smart and sassy Romana, a Time Lord fresh from the Academy. Landing on the wintry planet of Ribos to locate the first segment, the TARDIS crew quickly find themselves embroiled in a little local trouble with a pair of conmen and an unstable warlord... Doctor Who: The Ribos Operation is not currently listed with streaming providers in your selected region, but availability can change over time. It has a user rating of 6.8 out of 10 from 5 votes. Fans of science fiction movies may also want to explore similar titles below.