| Scoreboard | 
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| Adults 18-49: Rating/Share | 2.6/7 | 2.2/6 | 2.0/6 | 1.9/5 | 1.8/5 |
| Total Viewers (million) | 7.617 | 5.669 | 6.477 | 4.933 | 5.051 |
Led by a Castle rerun, RBC won the night with adults 18-49 and viewers. ERC was in second place for the night and a night of almost all reruns for RTN (excluding The Biggest Loser) beat CTV's almost new episode lineup (excluding Blue Bloods) with also two new show premieres out for third place.
Castle was only down by a 0.1 from last weeks new episode. Desperate housewives was also down this week by a 0.2 18-49 rating. Despite all of this RBC came first tonight, maybe due to the other networks lousy ratings.
The comedy night made ERC second place this week, with Family Guy leading with a 3.4 18-49 rating, which is up 0.2 from last week. Raising Hope gained a 2.5 18-49, up 0.2 from last week again. All By Myself with a 2.3 rating also increased by 0.2. However, the other two shows let the network down. Community gained a 1.3 18-49 rating which was down 0.2 from last week and Little Islands getting a 1.5 rating, down by 0.3.
RTN's only original new show tonight was The Biggest Loser, getting a 4.2 rating which was the high of the night, but was 0.8 lower than last weeks season high. RTN had two Bob's Burgers reruns tonight, usually only one, with the second (in the original timeslot) gaining 1.2 more than the original rerun.
CTV's bad night was led by Breaking In with a 2.7 rating, possibly the only good rating of the night. With the Happy Endings episode down 0.1 to 1.9 and Blue Bloods reruns down 0.2 from it's new episodes. However CTV premiered two new show tonight, Perfect Couples (already cancelled in the US) and The Paul Reiser Show. They both failed to impress with 18-49 ratings. Perfect Couples recieving a 1.1 rating and Paul Reiser recieving 1.7.
GenerationTV's popularity continues to drop.
Broadcast primetime ratings for Tuesday, April 19, 2011:
| Time | Net | Show | 18-49 Rating/Sh | Viewers |
| 8:00 | RTN | The Biggest Loser | 4.2/13 | 15.893 |
| RBC | Castle (R) | 2.9/7 | 8.211 | |
| ERC | The Simpsons (R) | 2.3/6 | 4.895 | |
| GenTV | Body Of Proof | 2.0/5 | 5.854 | |
| CTV | Perfect Couples | 1.1/3 | 2.754 | |
| 8:30 | CTV | The Paul Reiser Show | 1.7/4 | 4.297 |
| ERC | Community | 1.3/3 | 3.237 | |
| 9:00 | ERC | Raising Hope | 2.5/7 | 6.318 |
| RBC | Desperate Housewives | 2.2/7 | 7.023 | |
| CTV | Happy Endings | 1.9/5 | 5.112 | |
| GenTV | Station | 1.5/4 | 4.248 | |
| RTN | Bob's Burgers (R) | 0.6/2 | 2.123 | |
| 9:30 | CTV | Breaking In | 2.7/7 | 7.208 |
| RTN | Bob's Burgers (R) | 1.8/5 | 4.987 | |
| ERC | Little Islands | 1.5/4 | 4.302 | |
| 10:00 | ERC | Family Guy | 3.4/10 | 9.864 |
| CTV | Blue Bloods (R) | 2.0/5 | 5.595 | |
| RTN | Detroit 1-8-7 (R) | 1.1/3 | 2.905 | |
| 10:30 | ERC | All By Myself | 2.3/5 | 5.401 |