NBC's The Voice took top honors as the top-rated show among the key 18-49 age group last week, but, with 17.33 million viewers, CBS's NCIS retained the title of the most-watched show among total adults. While American Idol placed both of its weekly episodes in the 18-49 list, the Thursday edition ranked only No 13 among total viewers with 12.46 million. Following a week of compelling coverage of the Boston marathon bombers and the Texas explosion, ratings for the evening newscasts slipped significantly. NBC Nightly News with Brian Williams remained the top-rated newscast with 8.13 million viewers, down from 9.83 million a week earlier. ABC World News with Diane Sawyer came in second with 7.52 million viewers, down from 8.49 million. The CBS Evening News with Scott Pelley trailed with 6.45 million, down from 7.28 million the previous week. For the week overall, CBS led among total adults (and the 18-49 demo) with an average 5.6 rating and a 9 share. ABC was second with a 4.2/7. Fox took third with a 3.7/6, while NBC trailed with a 3.3/5.

The top ten shows of the week according to Nielsen Research:
1. NCIS, CBS, 11.0/17; 2. The Big Bang Theory, CBS, 9.3/16; 3. Dancing With The Stars (Monday), ABC, 8.9/14; 3. NCIS: Los Angeles, CBS, 8.9/13; 5. The Voice, NBC, 8.4/13; 6. Dancing with the Stars (Tuesday), ABC, 8.3/12; 6. Person of Interest, CBS, 8.3/13; 8. The Voice (Tuesday), NBC, 8.2/13; 9. 60 Minutes, CBS, 7.6/13; 9. American Idol (Wednesday), Fox, 7.6/12; 9. Castle, ABC, 7.6/12.