Secrets & Mysteries is a television series which originally aired in syndication from 1988 to 1989. It was hosted by Irish actor Edward Mulhare and dealt with topics of a paranormal nature, as well as mysterious historical events. It was similar to the 1970s/1980s series In Search of....

"Secrets of the Unknown invites you into the world of the bizarre, strange, and unusual. From ninjas who are said to transform into panthers, to the peculiar myths and rituals surrounding King Tutankhamun's tomb, to Adolf Hitler's occult connections, the sinking of the Titanic, the disappearance of Amelia Earhart, Bigfoot, UFOs, ghosts, dreams and nightmares, the Hindenburg disaster, and other subjects. These documentaries provide a rich visual showcase for unexplained phenomena."

The series is considered a pioneer in the realm of historical and paranormal investigative television, and is also considered to be something of a cult classic among many fans. The series consists of 26 episodes, written by Erik Nelson and produced by Craig Haffner. It was released on home video in the late 1980s to the early 2000s under the title Secrets of the Unknown.