One of the big 4 broadcast nets turned in a dominant performance in the key demo of viewers 18-49 for the week of Jan. 25-31. Fox had all of the top four programs of the week in the demo, with “Grease: Live” leading the way.

Based on Nielsen Live+3 data for the week, Fox’s “Grease: Live” delivered a 5.2 average rating in 18-49, followed by “The X-Files” with a 4.4 average, “Lucifer” with a 3.4 and Wednesday’s “American Idol” with a 3.0. CBS’s “Criminal Minds” and ABC’s “The Bachelor” tied for fifth place with 2.9 averages.

“Grease Live” was also the top show of the week in total viewers, delivering 14.301 million in L+3. CBS, however, had three of the top 5 shows, including second-place “Scorpion” with 13.582 million and third-place “NCIS: Los Angeles” with 13.058 million.

Fox’s “The X-Files” was fourth in total viewers with 12.704 million, ahead of CBS’s “NCIS” encore with 12.265 million.