TV Ratings: NBC's 'Chicago' Trio Leads Wednesday Primetime Mónica Marie Zorrilla, provided by Feb. 18, 2021 FacebookTwitterEmail As usual, NBC’s “Chicago” crossover trio, which consists of the three dramas “Chicago Med,” “Chicago Fire,” and “Chicago PD,” took up the top three slots in Wednesday, Feb. 17’s overnight primetime numbers. The fast affiliate ratings from Nielsen+Live Same Day indicate that a new episode of the third installment of executive producer Dick Wolf’s franchise, “Chicago Med,” drew a solid 0.9 in the key adults 18-49 demo and approximately 7.38 million viewers at 8 p.m. Brother series “Chicago Fire” was runnerup to the medical drama in the key demo, which ran at 9 p.m. and drew a 0.9 rating and 7.09 million viewers. Closing out the NBC trio at 10 p.m. was a new episode of “Chicago P.D.,” which earned a 0.8 in the 18-49 demographic and 5.72 million viewers.