Although 'Curfew Shall Not Ring Tonight' was the last episode of the series to air as an original broadcast, it was not the last episode actually filmed. That honor goes to another episode (#38). According to John Forsythe, who owned the production company (Bachelor Productions) which produced the series, the last 5 episodes were filmed out of broadcast order. Several had to be reedited due to script changes. However, the entire crew all knew by this time that the series was going to end production and wanted to at least tie the last episode into some logical send off. Since it didn't have a formal finale, this episode ended up being the last one. In it, Kelly moves on campus with Ginger and share an apartment.
Jane Withers, who is the real life aunt of series regular Bernadette Withers, plays the role of her housemother in this final episode of the series.