The series takes place during the years leading up to the year 2000, and follows offender profiler Frank Black (Lance Henriksen), a law enforcement consultant with the ability to see inside the mind of criminals, working for a mysterious organization known as the Millennium Group. Despite premièring with impressive ratings, viewership declined throughout its three-season run, and it was finally canceled by Fox in 1999 after a total of sixty-seven episodes.
When offender profiler Black investigates several deaths on a cargo ship, he encounters a mysterious woman who shows him visions of a life in which he had never joined the Millennium Group. Upon recovering, his experience leads him to doubt his role in the organisation. "Siren" was viewed by approximately 5.68 million households during its original broadcast. The episode received positive critical reviews, with one reviewer drawing comparisons with the film It's a Wonderful Life.