The eighth series (2004) was the first released directly to VHS and DVD as four episodes in the US and six in the UK were released before airing on television on Nick Jr. in the UK and PBS in the US. It introduced a number of significant changes to the show. Many of the original founding team involved in the original show since 1984 left the production, including Britt Allcroft, director and writer David Mitton, and original composers Mike O'Donnell and Junior Campbell. The latter two had been embroiled in a protracted legal dispute with HiT before their departure. Asquith, who was part of the original production team since 1984, took over as director, while Simon Spencer replaced Phil Fehrle as producer.