It was a TV show from the 90's that was built around the coming millennium.
It was about an ex-FBI agent who could look at things and see them through the eyes of serial killers. (Whether it was cause he knew psychology like in the TV show Criminal Minds or cause of magical powers like in any show with magic is beyond me but who really cares?)
The focus of the show was the coming Millennium!
And what happened on the show once the Millennium happened?
No one knows, the show was canceled in the spring of 1999.
But the main character of the show did appear in an X-Files episode that takes place on Dec 31 1999. But he left before the new year was rung in so we still never see him in the new millennium.