With the TARDIS occupants trapped in a chronic histeratic loop (forever reliving the same moment in time), the devious Meglos - disguised as the Doctor - gains the trust of the Tigellans along with full and private access to their power chamber.
Quest roles:
Jacqueline Hill(Lexa), Bill Fraser(General Grugger), Crawford Logan(Deedrix), Edward Underdown(Zastor), Frederick Treves(Lieutenant Brotadac)