The peacock network crows about the ratings for last night’s airings of The Voice (a rerun) and Rock Center with Brian Williams.

Thursday Results:

* From 8-10:01 p.m. ET, an encore telecast of “The Voice” scored a 1.3/3 in 18-49 and 3.8 million viewers overall. In total viewers, it’s NBC’s biggest audience in the time period since September 27. From its first half-hour to its fourth, the “Voice” encore grew by 27 percent in 18-49 rating (to a 1.4 from a 1.1).

* From 10:01-11 p.m. ET, > “> Rock Center> “> (1.3/3 in 18-49, 4.8 million viewers overall) delivered its highest 18-49, 25-54 (1.7) and total-viewer results since September 13. The 1.3 rating matches the second-highest 18-49 result ever for a regular hour-long edition of “Rock Center.”

* Week to week, “Rock Center is up 18 percent in adults 18-49 (to a 1.3 rating vs. a 1.1), 21 percent in adults 25-54 (1.7 vs. 1.4) and 28 percent or 1.1 million persons in total viewers (4.776 million vs. 3.717 million).