Doctor Who - Planet of Giants

After a malfunction causes the Tardis to rage out of control, the crew is reduced to approximately one inch in height. With this diminutive stature, they encounter a corrupt deal between a scientist and a businessman regarding a substance called DN6, a pesticide that may rid the world of insects. William Hartnell, the first Doctor, leads the crew in this inventive black-and-white episode which features insects more than double the size of the crew members.