Doctor Who: The Web of Fear

The Web of Fear was the fifth serial of season 5 of Doctor Who. It saw the return of the Great Intelligence and its robotic Yeti, as well as Professor Edward Travers. Perhaps most notably, however, it featured the first appearance of Colonel — later Brigadier — Lethbridge-Stewart, played by Nicholas Courtney. UNIT, however, was not introduced until his next appearance, in The Invasion.