The only was up for the #OneChicago franchise on Wednesday night.
The latest crossover resulted in bumper ratings, with the three-hour extravaganza averaging 8.5 million viewers and a 1.4 rating.
Chicago Fire started things off with 8.1 million total viewers and a 1.3 rating, hitting its best numbers in a year.
Chicago Med followed with 8.8 million total viewers and a 1.4 rating, scaring up its best numbers in over 18 months.
Chicago P.D. closed things off with 9 million total viewers (!) and a 1.6 rating, its best numbers in over 3 years.
It was a successful night for this franchise!
Over on The CW, Riverdale came down to 832,000 viewers and a 0.2 rating.
This was erosion of 27% in viewers and 50% in the demo. This matches the lowest demo rating ever for the series.
Nancy Drew was also on the down side, coming in at 814,000 viewers and a 0.2 rating, but it did have healthy retention from Riverdale.
Over on FOX, The Masked Singer inched up a tenth to 7.2 million total viewers and a 2.1 rating.
Almost Family remained stable at 2.5 million viewers and a 0.7 rating, but we need to remember that the series is shedding over 66% of its lead-in.
Over on CBS, Survivor bounced back to 6.8 million total viewers and a 1.4 rating.
SEAL Team was also on the plus side, coming in at 4.5 million viewers and a 0.7 rating.
Unfortunately, SWAT was down to new lows, with 3.6 million viewers and a 0.5 rating.
Over on ABC, Schooled (3.4 million/0.8 rating) and Modern Family (4.2 million/1.0 rating) were each up a tenth.
The Goldbergs (4.2 million/1.0 rating), Single Parents (2.8 millio/0.7 rating), and Stumptown (2.8 million/0.6 rating) were all even with last week.
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Paul Dailly is the Associate Editor for TV Fanatic. Follow him on Twitter.