“The Big Bang Theory” continues to be a big hit in its seventh season.

The CBS sitcom drew 20.1 million viewers Thursday — its largest audience ever for a regularly scheduled episode.

“Big Bang” also scored a 5.6 rating in the adults 18-49 demo and a 7.5 rating with adults 25-54, its best numbers in both demos since last February.

The show was easily the most-watched program of the night.

Ranking No. 2 was its lead-out “The Millers,” which drew 13.6 million viewers.