AMC’s “Breaking Bad” is building momentum leading up to its series finale later this month, drawing a record 6.4 million viewers for Sunday’s episode.

The drama benefited from an hourlong weather-related delay on NBC’s “ ,” which roughly coincided with “Breaking Bad’s” airtime in the East.

It was up a big 1.3 million week to week and easily surpassed the show’s previous high of 5.92 million for its season premiere on Aug. 11, according to Nielsen.

“Breaking Bad” also did very well in demos, drawing 4.05 million adults 18-49 — or nearly two-thirds of its total audience.

Through six episodes in Live+Same Day estimates from Nielsen, this year’s “Breaking Bad” is averaging 5.2 million total viewers and 3.3 million adults 18-49, more than double its year-ago numbers in both categories.

According to Trendrr, “Breaking Bad” was the No. 1 television show of the night in social activity, and the No. 1 cable show for the full week.