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, The Gold Robbers" and "Doomwatch", and would go on to arrange the theme for "Open All Hours" (which was written by Joseph Ascher), 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.