“Young Sheldon” made its timeslot debut in the post-“Big Bang Theory” spot Thursday night on CBS, with the freshman show retaining an impressive amount of its lead in’s audience.

“Young Sheldon,” airing at 8:30 p.m., is currently averaging a 2.4 rating in adults 18-49 and 13.3 million viewers. While that is down significantly in both measures from the series premiere in September (3.8, 17.2 million), the show retained nearly 90 percent of “Big Bang Theory’s” audience in the key demo and approximately 95 percent of its audience in total viewers. “Big Bang Theory” currently holds a 2.7 and 14.1 million viewers, which is even with its performance last week.

Later on CBS, the Season 5 premiere of “Mom” (1.8, 9.6 million) was up significantly in both measures from the Season 4 premiere. The Season 3 premiere of “Life in Pieces” (1.5, 7.7 million) was also up significantly in total viewers. The series premiere of “S.W.A.T” opened solid to a 1.3 and 7.5 million viewers.

It should be noted also that CBS’ primetime lineup was preempted in New York City on Thursday night for NFL football, meaning these numbers will likely be subject to adjustment later today.

On ABC, “Grey’s Anatomy” (1.8, 7.3 million), “Scandal” (1.1, 4.9 million), and “How to Get Away with Murder” (0.9, 3.6 million) were all even.

For NBC, “Superstore” (1.0, 3.5 million), “The Good Place” (1.0, 3 million), “Will & Grace” (1.5, 5.6 million), “Great News” (0.7, 2.7 million), and “Chicago Fire” (1.0, 5.8 million) were all down in both measures.

On Fox, “Gotham” (0.9, 2.7 million) was even while “The Orville” (1.0, 3.8 million) was down slightly in both measures.

For The CW, “Supernatural” (0.6, 1.8 million) and “Arrow” (0.5, 1.4 million) were both even.

CBS won the night with a 1.9 and just under 10 million viewers. ABC was second with a 1.3 and 5.3 million. NBC was third with 1.0 and 4.4 million. Fox was fourth with a 0.9 and 3.2 million. The CW averaged a 0.5 and 1.6 million.