In the conclusion of the four-part story "The Time Warrior," the Doctor (Jon Pertwee) has arrived in Medieval England in hopes of rescuing several kidnapped 20th century scientists. His efforts are impeded by Sontaran space warrior Lynx (Kevin D. Lindsay) and pirate chieftan Irongron (David Daker). But help arrives in the form of a primitve but most effective weapon, bringing this story to an explosive climax. Worth noting is the fact that the Doctor identifies his home planet, Gallifrey, by name for the first time in the series (after 11 seasons on the air, it's about time). Written by Robert Holmes, Doctor Who: The Time Warrior, Episode 4 first aired on December 29, 1973. ~ Hal Erickson, Rovi