Unsolved Mysteries is an American television program, hosted by Robert Stack

Robert Stack

Robert Stack was an American actor. In addition to acting in more than 40 films, he was the star of the 1959-1963 ABC television series The Untouchables and later served as the host of Unsolved Mysteries.-Early life:...

, from 1987 until 2002, and later by Dennis Farina

Dennis Farina

Dennis Farina is an American actor of film and television and former Chicago police officer. He is a character actor, often typecast as a mobster or police officer. His most known film roles are those of mobster Jimmy Serrano in the comedy Midnight Run and Ray "Bones" Barboni in Get Shorty...

, starting in 2008. It was broadcast first as specials in 1987, then as a regular series on NBC

NBC

The National Broadcasting Company is an American commercial broadcasting television network and former radio network headquartered in the GE Building in New York City's Rockefeller Center with additional major offices near Los Angeles and in Chicago...

 (1988–1997), CBS

CBS

CBS Broadcasting Inc. is a major US commercial broadcasting television network, which started as a radio network. The name is derived from the initials of the network's former name, Columbia Broadcasting System. The network is sometimes referred to as the "Eye Network" in reference to the shape of...

 (1997–1999), Lifetime

Lifetime Television

Lifetime Television, often referred to as Lifetime TV, or most commonly, Lifetime, is an American cable television specialty channel devoted to movies, sitcoms and dramas, all of which are either geared toward women or feature women in lead roles. The cable network is owned by A&E Television Networks...

 (2001–2002), Spike (2008-2010) and back to Lifetime

Lifetime Television

Lifetime Television, often referred to as Lifetime TV, or most commonly, Lifetime, is an American cable television specialty channel devoted to movies, sitcoms and dramas, all of which are either geared toward women or feature women in lead roles. The cable network is owned by A&E Television Networks...

 (2010-present).
Unsolved Mysteries uses a documentary format profiling real-life mysteries and features reenactments of unsolved crimes, missing persons, conspiracy theories and unexplained paranormal phenomena (alien abductions, ghosts, UFOs, and "secret history

Secret history

A secret history is a revisionist interpretation of either fictional or real history which is claimed to have been deliberately suppressed, forgotten, or ignored by established scholars.-Secret histories of the real world:...

" theories).

The concept of Unsolved Mysteries was created upon a series of three specials produced by John Cosgrove and Terry-Dunn Meurer that they pitched to NBC

NBC

The National Broadcasting Company is an American commercial broadcasting television network and former radio network headquartered in the GE Building in New York City's Rockefeller Center with additional major offices near Los Angeles and in Chicago...

 in 1985 and were shown in 1986 called "Missing...