Jenny Agutter (Roberta Faraday) and Christopher Witty (Jim) would later reprise their roles in the film adaptation The Railway Children (1970).
The eldest of the railway children, Roberta, is named after Berta Ruck, a close friend of E. Nesbit.
This was the third television adaptation of the novel (previous versions being broadcast by BBC television in 1951 & 1957. However, unlike this one, recordings of those earlier versions no longer exist.