More than five years into its run, AMC’s “The Walking Dead” remains a primetime powerhouse and is well-represented in Nielsen’s year-end lists of the most popular TV and social media draws of 2015.

According to Nielsen “live plus-7” estimates through mid-November, “Walking Dead” was the No. 1 entertainment series of the year in adults 18-49 and adults 18-34 and trailed only NBC’s “Sunday Night Football” and CBS’ “The Big Bang Theory” and “NCIS” in total viewers. It averaged 19.7 million viewers per episode to hold off the year’s hottest newcomer, Fox’s “Empire” (17.8 million).

The zombie drama was the most time-shifted television program of 2015 when comparing its viewership done same-day vs. that done within a week of a telecast. Nielsen estimates that “The Walking Dead” gained 10.89 million viewers in a week’s worth of VOD and DVR playback, and was followed by “The Big Bang Theory” (9.40 million), “Empire” (7.66 million) and NBC dramas “The Blacklist” (7.33 million) and “Blindspot” (7.13 million).

The top “L+7” gainers on a percentage basis for the year were all on cable: FX’s “Fargo” (240.3%), HBO’s “True Detective” (220.7%), AMC’s “Better Call Saul” (215.2%), A&E’s “Bates Motel” (201.8%) and HBO’s “Games of Thrones” (195.9%).

“Walking Dead” ruled as the No. 1 series on television in Twitter exposure for a second straight year, according to Nielsen, and gave AMC the top show for a third straight year (“Breaking Bad” ruled in 2013). On average, about 4 million people saw one or more of the 424,000 tweets sent about each new episode, and these tweets were sent by an average of 153,000 unique authors and seen about 28 million times. ABC’s “The Bachelor” was No. 1 in unique audience with 3.59 million, followed by HBO’s “Game of Thrones” (3.17 million), ABC’s “The Bachelorette” (2.59 million) and Fox’s “Empire (2.53 million). “Empire” actually averaged more tweets than any show during the year (559,000), with “Walking Dead” second (424,000) and ABC Family’s “Pretty Little Liars” third (285,000).

2015 Top 10 Series on Twitter (Ranked by Unique Audience) Rank Net Program Avg. Unique Audience (000) Avg. Unique Authors (000) Avg Tweets (000) 1 AMC The Walking Dead 3,978 153 424 2 ABC The Bachelor 3,593 72 156 3 HBO/HBO Latino Game of Thrones 3,171 74 152 4 ABC The Bachelorette 2,587 49 114 5 FOX Empire 2,525 137 559 6 FX AHS: Hotel 2,336 87 239 7 ABC Family Pretty Little Liars 2,272 86 285 8 ABC Scandal 2,154 59 222 9 NBC Parks and Recreation 2,105 43 89 10 ABC Grey’s Anatomy 1,986 54 120

Among specials (non-series, non-sports telecasts) to air in 2015, awards shows and political programs combined to account for the 10 most popular on Twitter. The Grammy Awards on CBS reached the largest audience of them all (13.32 million), edging out the Academy Awards on ABC (13.02 million), the MTV Video Music Awards on MTV in August (11.82 million), the Golden Globe Awards on NBC in January (10.44 million) and the American Music Awards on ABC in November.

Boosting the total for the MTV Video Music Awards was the announcement on stage by Kanye West that he would be running for President of the United States in 2020. According to Nielsen, this resulted in the most-tweeted TV minute of 2015, with 248,000 tweets sent at 10:49 p.m. ET.

The three political programs to crack the top 10 in Total Unique Audience reached via Twitter were President Obama’s State of the Union address in January (9.73 million), the first Republican presidential primary debate of the year on Fox News Channel in August (9.28 million) and the second GOP debate on CNN in September (9.01 million).

NBC’s telecast of the Super Bowl, which was the most-watched program of the year with an average audience of 115.2 million viewers, also towered over everything else on Twitter. A Total Unique Audience of roughly 16.13 million people saw one or more of the 25.07 million tweets about the game, and the tweets were sent by 5.12 million unique authors and seen a total of 2.05 billion times.

No. 2 on the list was the pay-view-view boxing event between Floyd Mayweather Jr. and Manny Pacquiao in May. It reached a Total Unique Audience of 11.62 million saw one or more of the 5.86 million tweets about the match, and the tweets were sent by 1.82 million unique authors and seen a total of 491.6 million times.

Top 10 Time-Shifted TV Programs of 2015

(Ranked by Absolute Difference) Rank Program Network Absolute Difference 1 The Walking Dead AMC 10,894,000 2 The Big Bang Theory CBS 9,396,000 3 Empire FOX 7,663,000 4 The Blacklist NBC 7,327,000 5 Blindspot NBC 7,125,000 6 Modern Family ABC 7,052,000 7 Fear the Walking Dead AMC 6,945,000 8 NCIS CBS 6,916,000 9 Game of Thrones HBO 6,299,000 10 Scandal ABC 5,994,000

Source: Nielsen