In the first episode of the four-part story "The Underwater Menace," the TARDIS crew rediscovers the lost continent of Atlantis -- or do they? At least one thing is certain: The Doctor (Patrick Troughton) will have to spend the next three weeks thwarting the sinister machinations of one Professor Zaroff (Joseph Furst). Written by Geoffrey Orme, Doctor Who: the Underwater Menace began its original BBC run on January 14, 1967. Only episode three of the story is known to exist. ~ Hal Erickson, Rovi