The show's staff had decided since Series 3 that most of the best stories of The Railway Series had been adapted, the rest involving too many new characters or closely resembling previous stories. With Series 5, the decision was made to write a full series of original, staff-written stories. One reason for this was producer Britt Allcroft's desire to create a theatrical Thomas the Tank Engine movie, and requested that director David Mitton show off his modelling skills. Series 5 aired in 1998, and the movie Thomas and the Magic Railroad was released 2 years later. Some inspiration for the stories came from a former LMR manager named David Maidment. In 1997, Maidment met with Steven Wright about the possibility of supporting the Railway Children charity, and while Wright told him the series' staff commonly received such requests, they would consider. During their meeting, Maidment relayed stories about his railway experiences working in South Wales and as the manager at station. Days later, Maidment received a call asking if he would allow some of his stories to be used as material – the stories from The Railway Series were frequently based on true events, and Allcroft and Mitton preferred this. Maidment agreed, and was also asked to review each story to make sure that the railway in the show operated realistically. As a result, Maidment received writing credit alongside Allcroft and Mitton. 10,000 pounds was donated to the Railway Children for his work. These stories are amongst those adapted:
"Baa!" – a ram invades a railway station and attacks some vandals; additionally, the idea of a "Best Kept Station" competition.
"James and the Trouble with Trees" – rain erodes an embankment, causing a tree to slide down and stand upright on the tracks.
"Gordon and the Gremlin" – bathwater in a luxury coach splashes around the compartment.
The design for each new character would be chosen by David Eves, and given to David Mitton for approval.
Filming
Mitton shot 2,700 slates for Series 5, the most of any of the series he shot for Thomas. Stock Footage Theme Music From Season 3 and 4.
Broadcast
Previously Thomas had only appeared in the US as a segment on the TV showShining Time Station, but Series 5 aired in the US as part of the half-hour Storytime with Thomas program. Each episode would include a new Series 5 episode, an episode of Britt Allcroft's Magic Adventures of Mumfie, and a Series 4 episode narrated by George Carlin, with music videos and footage of Day out with Thomas in between.