On a night that saw repeats or pre-emptions of some top shows on the competition, NBC rolled to victory in key demos Tuesday behind a two-hour edition of “The Voice” and nice sampling for new drama “Game of Silence” on a special night.

According to preliminary national estimates from Nielsen, “The Voice” averaged a 2.2 rating/8 share in adults 18-49 and 10.7 million viewers overall, easily winning its timeslot though down a little from its hourlong Tuesday original of last week; the show’s live playoffs continue with a special hour tonight too.

At 10 p.m., the preview of “Game of Silence” averaged a solid-enough 1.5/5 in 18-49 and 6.5 million viewers overall, winning the hour in demos ahead of its regular-timeslot debut Thursday night at 10 opposite ABC’s “The Catch” and CBS’ “Rush Hour.” “Game of Silence,” an adaptation of a Turkish drama, is just the latest in a string of programs to benefit from airing behind “The Voice” this season, and its preliminary retention of the music competition (66%) puts it behind those of the premieres/previews for “Blindspot” (89%) and “Chicago Med” (85%) but ahead of “Crowded” (63%), “Heartbeat” (56%) and “Telenovela” (50%).

ABC aired repeats of comedies “Fresh Off the Boat” (0.8/3 in 18-49, 3.5 million viewers overall) and “The Real O’Neals” (0.7/2 in 18-49, 2.7 million viewers overall), followed by “Marvel’s Agents of SHIELD” (1.0/3 in 18-49, 3.0 million viewers overall) and “Beyond the Tank” (0.6/2 in 18-49, 2.1 million viewers overall), both up a tick from last week. While “SHIELD” has been rating lower in its third season, it remains a strong gainer in time-shifted viewing; its March 22 episode doubled its same-day rating in Nielsen’s “live plus-7” estimates (1.8 vs. 0.9).

Fox’s “New Girl” (1.1/4 in 18-49, 2.6 million viewers overall), which was just renewed for a sixth season, rose 0.2 from its prior original of two weeks ago as it may have benefited from a repeat of ABC’s “Fresh Off the Boat” and the absence of CW’s “The Flash.” It was followed by a repeat “Grandfathered” (0.6/2 in 18-49, 1.7 million viewers overall), an original “Brooklyn Nine-Nine” (0.9/3 in 18-49, 2.1 million viewers overall), which was steady week to week, and a new “The Grinder” (0.6/2 in 18-49, 1.6 million viewers overall).

CBS aired repeats of “NCIS: New Orleans” (1.2/4 in 18-49, 9.0 million viewers overall) and “NCIS” (1.3/4 in 18-49, 9.9 million viewers overall) in a reversal of their normal timeslots, and finished the night with another “NCIS: New Orleans” encore (1.2/4 in 18-49, 9.0 million viewers overall). Even with no original programming, the net finished second to NBC for the night in 18-49 and 25-54 and was neck and neck with the Peacock in total viewers.

At CW, “iZombie” had a solid finish to its season with a two-hour finale, averaging a 0.5/2 in 18-49 and 1.4 million viewers overall from 8 to 9 — its largest overall audience since February — and a 0.5/2 in the demo and 1.2 million total viewers in its regular 9 p.m. timeslot; in adults 18-34, its regular-timeslot 0.5 rating was up a tick from last week and (at least preliminarily) tied with ABC’s “Agents of SHIELD.” The solid results are another indication that the already-renewed drama doesn’t necessarily share a lot of viewers with its regular lead-in “The Flash,” which is CW’s top-rated show and was off for the night. Next week, “Flash” returns and leads in to event series “Containment.”