Porridge (TV series) himself as the judge, a character role subsequently played by Maurice Denham in two episodes of the third series. The theme music for the closing credits was written by Max Harris, who had also written the theme music for numerous other TV shows, including "The Strange World of Gurney Slade" and "Doomwatch", and would go on to write the theme for "Open All Hours", another of the Seven of One pilots. The cheery theme was "deliberately at variance with the dour comedy" and given a music hall feel by Harris because of the lead character's Cockney origins. Following the pilot
Porridge (TV series) is referred to in Birds of a Feather when the main protagonists' husbands are imprisoned there after reoffending in Series 7). The interior shots of doors being locked were filmed in Shepherds Bush Police Station - the BBC had a good relationship with officers there. In the episode "Pardon Me" Fletcher speaks to Blanco (David Jason) in the prison gardens: this was filmed in the grounds of an old brewery outside Baldock on the A505 to Royston. The barred windows approximated a prison. The building has since been demolished. The 1974 episode "A Day Out", which features a prison work