BuzzFeed Unsolved
True Crime ended with its 8th and final season in July 2021, while Supernatural started with its 7th and final season in October 2021 and ended in November. There are fifteen seasons in total. Due to the COVID-19 pandemic, Supernatural has one less season than True Crime because production was unable to secure haunted locations to visit under quarantine. The final episode was followed up by a behind-the-scenes documentary BuzzFeed Unsolved: The Making of the Final Investigation on November 24, 2021.