Video of the Day – Doctor Who: The Power of Kroll, 1978

The search for the fifth segment of the Key to Time takes the Doctor and Romana to the swampy third moon of Delta Magna, home to a methane refinery and a primitive race of Swampies who worship an ancient god. When Romana is captured, the Doctor uncovers the truth behind their deity - a colossal creature called Kroll, whose awakening threatens to destroy everything