JennyO

The episode of the Goodies is called "Radio Goodies":

(from Wikipedia)

The Goodies want to start a radio station, but Tim's and Bill's dreams of 'groupie girls', and also Graeme's only line in their jingle – "BOM!" – are soon put on hold; their application is delayed in the post, so they miss out on a licence to broadcast from the BBC. The trio decide to start a pirate radio station and, based on a disgruntled suggestion from Tim about the postal service, Graeme is inspired to start a pirate post office at the same time.

'Radio Goodies' is later launched from a huge submarine, with entry through a hatch which, working on the ice berg principle, has been disguised as a small rowing boat called "The Saucy Gibbon" with the words "Not a Pirate Radio Station" painted on the side.

Unfortunately, things are not off to a great start when Tim discovers that they only have one record ("A Walk in the Black Forest"), because Bill has not had enough money to buy any other records for their radio station....

This was the last episode in series 1 broadcast on Dec 20th 1970.

Cheers
Mark