• by Wayne Friedman , September 22, 2015

A mixed bag of results for new broadcast shows started off the new season on Monday night -- with the top four broadcast networks overall sinking by double-digit percentage in adults 18-49 ratings versus last year.

The major highlight was NBC’s “Blindspot” at 10 p.m., which was the network’s most heavily promoted new prime-time show, earning strong results -- a Nielsen preliminary 3.1 rating/10 share. All this came on the back of “The Voice,” which posted a 3.5/11 for its two-hour start.

CBSs new comedy “Life in Pieces” opened decently at 8:30 p.m. with a 2.7/9. It came after “The Big Bang Theory” pulled in a strong 4.5/16 -- although one full rating point weaker than last year’s premiere.

ABC had no new prime-time series for the night: “Dancing with the Stars” averaged a 1.8/6 for its two-hour premiere; “Castle” was at a 1.2/4, down a full rating point from last year’s start.

Fox didn’t show much life on the first night: Its new “Minority Report” at 9 p.m. could only muster a slim 1.1 rating/3 share. “Report” wasn’t helped at all from its lead in, second-year show “Gotham,” which was down more than 50% from a year ago, getting to a 1.6 rating/5 share.

For the night, NBC won big with a 3.3 rating/11; CBS, a 2.3/8; ABC, a 1.6/5; and Fox, a 1.3/4.

Compared to last year's start, the networks -- NBC, CBS, ABC, Fox and CW -- sank a collective 26% in adults 18-49 ratings, totaling 9.0 rating points versus 12.1 in 2014.