Detective Chizum was a Human police officer with the San Francisco Police Department in the late 20th century. In 1986, Chizum was assigned to investigate Gillian Taylor's disappearance as well as Pavel Chekov's escape from Mercy Hospital. Chizum investigated both matters and discovered that Taylor was involved in Chekov's escape from the hospital. This investigation led Chizum to discover many strange, but linked, occurrences in the San Francisco area, including Taylor's conversation with a strange man in North Bay Pizza who claimed to be from the 23rd century. All the signs led to the landing place of the HMS Bounty in Golden Gate Park, where impressions from the ship were still visible. Chizum determined that the actions were carried out by people from the future and found it reassuring