'Unsolved Mysteries' freaked out '90s kids. Now it's back to scare a new generation

If you were a child in the '80s or '90s - and maybe even if you were an adult - you probably lost a few nights' sleep to "Unsolved Mysteries."

Hosted by the leathery-voiced Robert Stack and featuring one of the eeriest theme songs in TV history, the long-running reality show scared the bejeezus out of a generation with stories about brutal murders and baffling disappearances, yeti sightings and alien abductions, medical mysteries and long-lost loves.

Airing for nine seasons on NBC and later moving to CBS and Lifetime, the program was both well ahead of its time - inviting audiences to "help solve a mystery" as they would later via countless Reddit discussions and hit podcasts - and firmly of it - with dated reenactments and low-fi special effects. Sometimes corny, often terrifying, "Unsolved Mysteries" left a mark on pop culture.

Now, like so many other nostalgia-steeped properties from the 1990s, it's being revived for the streaming era.