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In the second episode of the three-part story arc "Planet of Giants," the crew of the TARDIS, still shrunk to a height of one inch, tries to alert the authorities to the evil plans of Smithers (Reginald Barrett) and Forester (Alan Tilvern) to spread the deadly pesticide DN6 throughout the world. Unfortunately, the Doctor (William Hartnell) and his companions must make their way through a veritable jungle of giant matchboxes, deep sinkholes, and "huge" domestic pets. Even worse, our heroes must also face what one Doctor Who chronicler has described as "a new sort of death." Written by Louis Marks, "Dangerous Journey" originally aired on November 7, 1964.