Written by Anthony Read, the four-part Doctor Who adventure "The Horns of Nimon" begins as the TARDIS is immobilized, and the Doctor (Tom Baker) and Romana (Lalla Ward) find themselves caught in a space whirlpool. Also trapped in this dilemma is a vessel from the planet Skonnos, bearing a truly strange and disturbing cargo. The catalyst for this adventure is Soldeed (Graham Crowden), the last surviving Skonnon scientist, who in hoping to restore his world to its past empiric glories, has entered into an unholy alliance with the Nimons, an alien race which sustains itself with radioactive crystals -- and bizarre sacrificial rites. "The Horns of Nimon, Episode 1" first aired on December 22, 1979. ~ Hal Erickson, Rovi