Wednesday TV Ratings 8/23/23: Riverdale and Nancy Drew Rise in Series Finales, Big Brother and America’s Got Talent Slip, Superfan Continues to Embarrass (UPDATED)

Ratings Analysis: It was series finale night on the CW as 'Nancy Drew' (0.06, +0.01) and 'Riverdale' (0.05, +0.01) gained a hundredth apiece for their respective last episodes. Though neither drama set a new season high, they did avoid dropping for their final broadcasts. Over on CBS, reality offerings 'Big Brother' (0.62, -0.01) and 'Superfan' (0.14, -0.02) dealt with some small declines. 'Brother' topped the night as usual, while 'Superfan' lost to every (non-CW) show outside of the 10 p.m. 'So Help Me Todd' rerun (0.12). NBC's 'America's Got Talent' (0.50, -0.10) shed a full tenth when compared to Tuesday's episode and led into a rerun of 'Carol Burnett: 90 Years of Laughter and Love' (0.19). 'MasterChef' (0.34, +0.02) picked up two-hundredths on Fox and was the third highest-rated broadcast in the Adults 18-49 demographic. ABC had a rerun marathon of 'Abbott Elementary' (0.21/0.20/0.20/0.16) and a lone 'Rookie' encore (0.11).

Finals Update: All shows held their preliminary rounded ratings.

Time	Show	18-49 Rating	18-49 Share	Viewers (mil)	Network
8 PM	Big Brother	0.62	7	3.29	CBS
	America's Got Talent	0.50	6	4.88	NBC
	MasterChef	0.34	4	1.98	Fox
	Abbott Elementary (R)	0.21	3	1.85	ABC
	Nancy Drew (Series Finale)	0.06	1	0.35	The CW
8:30 PM	Abbott Elementary (R)	0.20	2	1.47	ABC
9 PM	Carol Burnett: 90 Years of Laughter and Love (R)	0.19	2	2.27	NBC
	Abbott Elementary (R)	0.20	2	1.31	ABC
	Superfan	0.14	1	1.20	CBS
	Riverdale (Series Finale)	0.05	1	0.21	The CW
9:30 PM	Abbott Elementary (R)	0.16	2	1.23	ABC
10 PM	So Help Me Todd (R)	0.12	1	1.22	CBS
	The Rookie (R)	0.11	1	1.12	ABC