Episode 5 A Bus Bomb and Poison
Following Zodiac's last confirmed murder of Paul Stine, he promised to terrorize the SF Bay area using various methods and making the crimes he committed seem random. He threated to use a bomb, but never carried out his threat. However, other possible crimes in the Bay area may have been the work of Zodiac, such as the stalking and attempted poisoning of school teacher Daniel Williams in Contra Costa County.