The running joke concerning "A Walk In The Black Forest" by Horst Janowski dates back to an episode in the first series, "Radio Goodies", in which the team set up a pirate radio station with only one record - Janowski's 1965 light-instrumental hit.
The constant references to gibbons date back to the 1960s radio series "I'm Sorry, I'll Read That Again" which starred the Goodies alongside John Cleese, David Hatch and Jo Kendall. This explains the huge laugh in the "Radio Goodies" episode where Graeme calls their pirate ship "The Saucy Gibbon". The 1975 season contains graffiti references to "Funky Gibbon", scrawled on the wall near Graeme's computer. This was a novelty single recorded by the team that reached number four on the British charts.
Although the series did well in the ratings, it was considered expensive to produce by the BBC due to the amount of specially commissioned props that needed to be built and amount of location shooting that each series required. In 1980 the BBC decided to drop production of any future series due to budgetary factors and the fact that they were eager to commission a TV series of Douglas Adams successful radio show 'The Hitchhikers Guide To The Galaxy' which was effects heavy and going to cost a considerable amount of money to finance. This resulted in The Goodies signing a deal with London Weekend Television to produce the next series of The Goodies (broadcast at the beginning of 1982). The BBC were then free to set aside the budget they would otherwise have allocated for a Goodies series and use it to finance 'Hitchhikers' which was broadcast in 1981 to great critical acclaim and the show was a ratings hit too. The Goodies LWT show only lasted one series before being canned due to budget cutbacks.