Host Robert Stack presides over an investigation into unsolved mysteries ranging from murders to UFO sightings. Through reenactments and interviews, viewers are presented with the known facts of each case. Anyone with additional information is then urged to contact the show's producers via a toll-free telephone number. Written by
Kevin Ackley <email@example.com>
Did You Know?
was the show's original host, hosting only the first episode, which aired as a special in January 1987. Afterwards, Karl Malden
hosted the following two specials before Robert Stack
permanently took over. See more
[introductory line; early episodes
This program is about unsolved mysteries. Whenever possible, the actual family members and police officials have participated in recreating the events. What you are about to see is not a news broadcast.