The first season dealt primarily with Black pursuing various serial killers and other murderers, with only occasional references to the Group's true purpose. The second season introduced more supernatural occurrences into the show's mythology, with Frank often coming into conflict with forces that appeared to be apocalyptic or demonic in nature. The final season showed Frank returning to Washington, D.C., to work with the FBI following the death of his wife at the hands of the Group. He was joined by a new partner, Emma Hollis. Despite Frank's warnings and what she herself observed, Emma ultimately joined the Group. Frank was last seen escaping from Washington, having taken Jordan from school.