This hobo-meets-Johnny Ball style approach to science-education proved appealing, and after two series, the show was sold to the national BBC2 network in 1994. The move saw two changes: the scope of the show was expanded nationwide, with a different region visited each episode; and the theme tune was changed from "No More Heroes" by The Stranglers to a twee and plinky number, more in keeping with the programme genre. Eventually this was replaced by a more upbeat theme, by "Wallace and Gromit" composer Julian Nott, played by a Czech orchestra.