Did the Zodiac imitate other elusive and notorious killers? Was the Zodiac inspired by popular culture, including fiction, film, and television? This episode examines possible inspirations, including the Batman comic books and series, TV shows such as Alfred Hitchcock Presents and Ironside, the films The Most Dangerous Game and Charlie Chan at Treasure Island, the strange case of a cab driver killing and taunting telephone calls to police, the still-unsolved murder of Cheri Jo Bates in Riverside, California, the story of the "3X Killer," and more. (NOTE: This episode contains many spoilers.)