It's a Mystery is a networked Children's ITV programme which ran for five series from 12 September 1996 to 9 May 2002. It was produced by The Media Merchants Television Company Ltd for Meridian Broadcasting Ltd. In Series five, the show was retitled as Mystery and featured different presenters. It was a magazine show featuring unusual stories including about UFOs, ghosts and other difficult to explain happenings, some of which were solved while others remained unexplained.

Neil Buchanan, best known for his regular arts show Art Attack, hosted the first series with Doctor Who actor Sophie Aldred. For the second and third series, Neil was joined by Gail Porter (1997–1999) from magazine show How 2 along with Tristan Bancks. In 2000, Gail and Tristan were replaced by Ben Jones and Shelley Blond. Following Neil's departure, Steve Wilson and Shiarra Juthan presented the final series in 2002.