UPDATED THURSDAY PM: NBC has tweaked its scheduling plans for Monday. The Sing-Off finale will now remain 2 hours, and the Perfect Couples preview will air at 10 PM, followed by an Office repeat.

PREVIOUS WEDNESDAY 5PM: With The Sing-Off current second cycle doing so well, it’s not surprising that NBC wants to extend it. The network will expand the season finale of the a cappella singing competition next Monday by a half-hour. It will also use the finale to get sampling for new comedy Perfect Couples. A preview episode of the midseason series, which will not be the pilot, will immediately follow the Sing-Off finale at 10:30 PM. Perfect Couples will premiere in its regular Thursday 8:30 PM slot on Jan. 20, when NBC launches its new six-comedy Thursday lineup. NBC used a similar strategy for new fall drama Outlaw, which was previewed after the finale of summer reality hit America’s Got Talent in September. This past Monday, The Sing-Off set series highs with a 3.3/9 in 18-49 and 9.5 million viewers overall.