Sunday’s “Real Housewives of Atlanta” reunion show and a special installment of “Watch What Happens Live” made Bravo the top-rated ad-supported cabler of the night in key demos while also setting a network record in the process.

Nielsen estimates that “Real Housewives of Atlanta” garnered a franchise high for a reunion show (4.29 million) and was the No. 1 unscripted cable entertainment telecast of the week in adults 18-49 (1.8 rating/6 share, or about 2.4 million viewers in the age group). In the 8 o’clock hour, it edged out CBS’ “The Amazing Race” (1.7/5) in 18-49.

It was followed by “Watch What Happens Live,” which set series highs (1.7/5 in 18-49, 3.92 million viewers overall) and finished ahead of Big Four network programs “Cosmos,” “The Good Wife” and “Believe.” The half-hour program featured host Andy Cohen interviewing guest Porsha Williams.

And capping the night for Bravo at 10 p.m. was “Married to Medicine” (1.0/3 in 18-49, 2.31 million viewers overall), rising about 20% week-to-week in 18-49.

From 8 to 11 p.m., Bravo averaged a 1.54 rating in adults 18-49 — its highest score on any night in network history. The previous high was a 1.40 rating in January of this year with “Real Housewives of Atlanta,” “Blood, Sweat & Heels” and “Thicker Than Water.”