 The railway gets closer and closer to the animals' homes, yet in the episode "Happy New Year" it turns out that the railway would be travelling under unsuitable land, and therefore the route is diverted from the Riverbank & Wild Wood areas.The popular theme song is based on the instrumental theme to the original film, which had been composed by Keith Hopwood and Malcolm Rowe and arranged by Brian Ibbetson.For the series, the song was adapted by the same composers and arranger and was sung by British singer-songwriter Ralph McTell.