The Voice (1.4/7) was the top-rated show on primetime last night, but the real winner looks to have been The Flash (0.7/3).

Celebrating its 100th episode, the CW’s Scarlet Speedster series was the only show to rise on a Tuesday of lows, declines and same old same old.

Edging toward the annual crossover with Arrow and Supergirl starting Sunday, last night’s clip-finessed “What’s Past Is Prologue” episode was up 17% among adults 18-49 over last week. The uptick did not carry over to lead-out Black Lightning (0.3/1), which stayed even with its November 27 airing.

Heading into its final few episodes of this inaugural season of sorts, The Conners (1.3/4) took a double hit Tuesday. One, the Roseanne spinoff was topped in a matchup for only the second time in its run by The Voice. Secondly, taking a 7% dip from last week, The Conners fell to an all-time low. That low may hurt a bit more because it isn’t just among the key demo but also in viewers, with 6.63 million sets of eyeballs watching.

To make a comparison with Roseanne, which had some ratings issues itself after a stellar debut, last night’s Conners was down a hard 50% from the eighth episode of the mothershow that aired on May 15.

The rest of ABC’s Tuesday saw The Kids Are Alright (0.8/3), Black-ish (0.8/3), Splitting Up Together (0.6/3) and the Nathan Fillion-starrer The Rookie (0.7/3) all down a tenth from their November 27 shows.

Over on NBC, The Voice was also down a tenth to match a season low, while the A Saturday Night Live Christmas (1.0/5) rang those holiday bells two-tenth less than last year.

Overall, the Comcast-owned net won the night in the demo with a 1.1/5, while close second-place CBS (1.0/5) was first in viewers with 9.91 million watching.

The latter network saw NCIS (1.2/5), FBI (1.0/5) and NCIS: New Orleans (0.8/3) all back exactly the same as their last originals of two weeks ago. On Fox, The Gifted (0.7/3) and Lethal Weapon (0.7/3) were unmoved from their final results of last week.