A down-to-the-wire NCAA championship game on cable put a dent in broadcast’s top program on Monday, NBC’s The Voice (2.4 rating in adults 18-49), which was down 0.4 (-36%) from a week ago to a cycle Monday low. Freshman NBC drama Blindspot (1.4), which already has been renewed for next season, also was off, by 0.2, from its fast national last week to a series low. (The thriller series gets adjusted down sometimes because of The Voice overruns, as it did last Monday to a 1.5.; there was a minute of overrun again last night.) The Voice still was the highest-rated program of the night in 18-49 and helped NBC win another Monday in the demo. UPDATE: The Voice was again adjusted up a tenth in the finals to a 2.5, while Blindspot slipped another tenth to a new Live+same day series low of a 1.3.

The other original broadcast drama offering last night, ABC veteran Castle (1.2, 6.9 million viewers), whose fate has not been determined, made a case for itself with a ratings uptick against a repeat NCIS: Los Angeles on CBS (and the conclusion of the NCAA game on the East Coast). Castle was up 0.1 in the demo and 6% in viewers to tie a Season 8 Live+Same Day high in 18-49 and set a new one in total viewers, pending updates. Castle‘s lead-in Dancing With The Stars (1.7, 11.6 million) was steady and the most-watched program of the night, leading ABC to a nightly win in total viewers. UPDATE: Castle, which was preempted for a baseball game in Chicago, was adjusted down a tenth to a 1.1, even with last week.

CBS, Fox and the CW were in repeats.