A repeat of Dateline NBC was adjusted down a tenth among adults 18-49 versus Friday's preliminary ratings. There were no other adjustments with adults 18-49.
Final broadcast primetime ratings for Friday, April 13, 2012:
| Time | Net | Show | 18-49 rating | 18-49 Share | Viewers Live+SD (million) |
| 8:00PM | CBS | Undercover Boss | 1.7 | 6 | 7.010 |
| ABC | Shark Tank | 1.6 | 6 | 5.490 | |
| FOX | The Finder | 0.9 | 3 | 3.450 | |
| NBC | Who Do You Think You Are? -R | 0.9 | 3 | 4.780 | |
| CW | Nikita - R | 0.3 | 1 | 0.880 | |
| tvbythenumbers.com | |||||
| 9:00PM | NBC | Grimm | 1.6 | 5 | 4.960 |
| CBS | ACM Presents: Lionel Richie (9-11) | 1.4 | 4 | 7.770 | |
| ABC | Primetime: What Would You Do? | 1.4 | 4 | 4.750 | |
| FOX | Fringe | 0.9 | 3 | 2.840 | |
| CW | Supernatural -R | 0.4 | 1 | 1.030 | |
| tvbythenumbers.com | |||||
| 10:00PM | ABC | 20/20 | 1.6 | 5 | 5.230 |
| NBC | Dateline NBC - R | 1.0 | 3 | 4.720 | |
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Nielsen TV Ratings: ©2012 The Nielsen Company. All Rights Reserved.
[bold] Fringe does what Fringe does. Ratings hardly matter anymore [/bold]