May 18, 2013 10:00am PT by Michael O'Connell
TV Ratings: 'Shark Tank,' 'Nikita' Finales Rise, 'Undercover Boss' Drops
ABC topped the last Friday of the 2012-13 season with an average 1.5 rating among adults 18-49 and 5.7 million viewers. Back-to-back episodes of Shark Tank earned 1.2 and 1.9 ratings in the key demo, with the 9 p.m. season finale up a tenth of a point from last week and 19 percent from last year's closer. 20/20 (1.5 adults) dropped two tenths of a point at 10 p.m.
A two-hour Dateline (1.1 adults) was even on NBC, while Rock Center (1.3 adults) grew by a tenth of a point. NBC averaged a 1.2 rating with 18-49-ers and 5.2 million viewers.
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Undercover Boss (1.0 adults) shed six tenths of a point at 8 p.m., with 48 Hours bringing in a 0.9 in the demo. CBS averaged a 1.0 rating among adults 18-49 and 4.9 million viewers.
Kitchen Nightmares and Bones encores fetched Fox a 0.6 rating with adults 18-49 and 2.2 million viewers.
And on the CW, the season finale of Nikita (0.4 adults) was up two tenths of a point from last week -- giving the network an average 0.3 rating in the key demo and 936,000 viewers.