Intro: Mix a horde of revolting, mud-formed jungle monsters with the most addictive drug in the universe and you have the genesis of trouble as The Doctor, Romana and K-9 are about to find out when they experience the "Nightmare of Eden."

Outro: A labyrinth, a gravity whirlpool, a human sacrifice. You'll find it's not a lot of bull when The Doctor contends with "The Horns of Nimon," next Sunday evening at 11. [source: ChicagoEpguides]