Mom P.I., on CBC (Canada)
IMDb; Thrilling Detective; TVarchive.ca; TV.com; Wikipedia
This ran for two seasons, from 1990-92. It was a Canadian dramedy about Sally Sullivan (Rosemary Dunsmore), a widowed waitress who was raising two kids, and started working as an assistant to a private investigator named Bernie Fox (Stuart Margolin). I think both lead actors must have been vaguely familiar to me before this show. Anyway, I don't really remember anything about the show beyond the title and basic premise, but I'm sure that while it was on, I found it reasonably entertaining. It'd probably be fun to see it again someday, but I very much doubt I'll ever get the chance.