*The Southern belles of “Real Housewives of Atlanta” returned for their fourth season, scoring both its highest season-premiere ratings and the best season-premiere numbers for the franchise as a whole, according to Nielsen.

The premiere pulled in 2.9 million total viewers, 1.9 million of them in the adults 18-49 demographic. All told, Sunday night’s episode bested the Season 3 premiere numbers by 20 percent in total viewers, and 10 percent in the demographic.

Elsewhere on cable Sunday, Showtime’s serial-killer hit “Dexter,” featuring Mos Def this season, attracted its biggest audience since the series’ Season 6 premiere Oct. 2, with 1.98 million viewers for its 9 p.m. airing and 2.45 million total for the night, including rebroadcasts.