Aired: 1987 - 1997 (NBC); 1997 - 1999 (CBS); 2001 - 2002, 2008- 2010 (Lifetime); 2008 - 2010 (Spike)
Theme Song: Michael Boyd & Gary Remal Malkin "Unsolved Mysteries Theme"

Not just any type of music will suffice for a program dedicated to weird happenings like UFO sightings and supernatural murders. The impending doom of the Unsolved Mysteries theme is as scary as John Carpenter's suspenseful Halloween soundtrack and as ill as host Robert Stack's gravelly voice. There's no mystery about it, this is one chilling piece of musical mayhem.