Born Free: A New Adventure teach the lioness how to survive in the wild. In 1960, Joy Adamson published a book called "Born Free", based on her (and her husband, George Adamson) experience raising the lioness Elsa. The book was followed by two others, "Living Free" (1961) and "Forever Free" (1963). In 1966, the first book was adapted into a movie. The film was a commercial and critical success, leading to a 1969 documentary called "The Lions are Free" and then a sequel, released in 1972 and based on the third book, but using the name of the second book. In 1974, the NBC did
Professor Edward Travers and Victoria, Travers is convinced of the Doctor's innocence. Upon the discovery of killer, robotic Yeti, Travers fears for the real Yeti but is temporarily suspected of controlling the robotic Yeti himself. Travers assists the Doctor in defeating the Great Intelligence, the true controllers of the robotic Yeti. He pursues what he believes to be a real Yeti after glimpsing it as the Doctor and his companions depart. Professor Travers reappears in "The Web of Fear". A robotic Yeti he brought back from Tibet is being exhibited in a museum in England. A Yeti control sphere that the Professor has