You know we’re in the May sweep now as the wildcard element came into play Tuesday. Going to two hours last night for the first of two Tuesdays in a row, The Voice (3.7/11) was  again in Knockout Round mode with Team Blake and Team Usher cutting to a final four like fellow judges Adam Levine and Shakira did the night before. While easily the highest-rated show on TV last night, Voice tumbled 10% from its 8-9 PM airing April 23 to hit a season low. That’s the second Tuesday in a row the NBC series has been up against a new NCIS (3.0/10) on CBS, and the second Tuesday in a row it was down double digits. Things are about to get a lot more interesting too: Tonight will see a network reality trifecta as The Voice, American Idol and Survivor go head-to-head-to-head for the first time this season.

Following The Voice last night was Grimm (2.0/5) in its new Tuesday slot, replacing the now-cut Ready For Love. Not only did Grimm deliver far better that its slot predecessor (up from Ready For Love’s 1.0/3 on April 23), but as expected the Voice lead-in proved a healthy jolt for the police procedural. It was up 54% from its last Friday broadcast April 26, marking the series’ highest-rated episode since October.

Related: TV Weekly Warfare: ‘The Voice’ Dethroned, Fox & CBS Hold Demo & Viewer Leads

The most-watched show of the night with 17.68 million viewers, NCIS bopped up 7% from its April 22 episode. The same could not be said of NCIS: LA (2.2/6), which fell 19% to a series low as it faced the extended hour of The Voice. Its lead-out, freshman Golden Boy (1.3/4), also suffered. Down 7%, the new show tied its lowest-rated Tuesday broadcast. With 12.79 million watching, CBS was No. 1 in viewers Tuesday while NBC took the top spot in the adults 18-49 demo.

Over on ABC, reality took a hit as well. Splash (0.9/3) sunk 18% from last week to hit a season low. It was results night on Dancing With The Stars (1.5/4)) on Tuesday, and of course that meant that someone was getting kicked off the dance floor. It also saw the show fall 25% from the spring season low of last week to a series low. After DWTS, it was an ABC News special in the slot usually occupied by Body Of Proof at 10 PM, Murder, Mystery, Amanda Knox Speaks (1.7/5) saw Diane Sawyer handling the first TV interview with the now-acquitted college student. With 8.56 million watching the interview last night Body Of Proof might want to watch its back because the special was also up 6% among adults 18-49 from the show’s April 22 airing, delivering a 12-week high in the slot for ABC in the 18-49 and 25-54 demos.

Fox’s Hell’s Kitchen (1.9/5) slipped 5% from last week, while lead-out New Girl (2.0/6) was down 9% from its last original April 9. Following that, The Mindy Project (1.3/3) was also down. The comedy fell 13% from its last original three weeks ago.

The CW’s only original of the night was Hart Of Dixie (0.5/2). The drama was up 25% from last week’s series low and up 10% from last week in total viewers.