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In the third episode of the four-part story "The Creature From the Pit," the Doctor (Tom Baker) learns that the titular creature is actually an ambassador from the planet Tythonus, who has been imprisoned by the despotic Lady Adrasta (Myra Frances). The villainess hopes to drain the creature of the precious metals in its system, thereby strengthening her hold on the planet Chloris. Meanwhile, Romana (Lalla Ward) endeavors to rescue both the Doctor and the Creature, with Adrasta's henchmen hot on her heels. Written by David Fisher, "The Creature From the Pit, Episode 3" was originally telecast on November 10, 1979.