It’s official, zombies still rule the television world.

Last Sunday’s season finale of AMC’s “The Walking Dead” averaged 18.4 million viewers and 11.5 million adults 18-49 (9.1 national rating), according to Nielsen’s “live plus-3” estimates, which include three days’ worth of DVR playback and VOD where available. The network said the episode is also expected to generate more than 1 million additional digits views.

The finale caps a fourth straight year that “Walking Dead” has finished as the most popular series on television among adults 18-49 when including the three-day playback numbers, according to Nielsen. Its average for the season (9.1) towers above NBC’s “Sunday Night Football” (7.5), Fox’s “Empire” (6.7), CBS/NFL Network’s “Thursday Night Football” (5.7) and CBS’ “The Big Bang Theory” (5.6). (“Sunday Night Football” again finished on top in same-day ratings.)

“Walking Dead” fell off a little this season, but still held up better than most other entertainment series in L+3. As a result it opened up ground on other top-10 shows like “Empire,” “Modern Family,” “The Voice” and “Scandal.”

Sunday’s finale of “The Walking Dead” grew from its same-day averages by 32% in adults 18-49 (9.1 vs. 6.9) and by 30% in total viewers (18.4 million vs. 14.2 million) vs. its same-day averages — lower-than-usual lifts for the show, highlighting the must-see-now nature of its finales. In L+3, the 9.1 rating on Sunday represents the show’s third highest of 2016 (behind its first two episodes in February).

Post-discussion series “Talking Dead” finished its season strong as well, with its finale averaged 7.4 million viewers and a 3.5 rating in adults 18-49 in L+3.