Sea of Souls is a BBC paranormal drama series, based around the fictional activities of a group of investigators into psychic and other paranormal events. Produced in-house by BBC Scotland, initially in association with Sony Pictures Television International, the series debuted on BBC One in the UK in February 2004. A second series was shown from January 2005, with a third following in 2006 and then a two-part special in April 2007. The programme was created by writer David Kane, who also wrote the entire first series. The two-part special, unlike the previous series, was an independent production for BBC Scotland by Carnival Films.