The zombies won again.

"The Walking Dead" was the most-watched show in Sunday prime time nationally and locally.

The AMC series about a zombie apocalypse averaged 12.4 million viewers, the biggest audience in the series' history. Of that audience, 8.1 million were in the 18-to-49 age group. "The Walking Dead" is the top show this season in the age group, surpassing CBS' "The Big Bang Theory."

"The Bible" averaged 11.7 million total viewers for its final two hours on History. The 10-hour miniseries concluded on Easter.

In national broadcast ratings, the NCAA Tournament was the biggest story. Updated ratings showed the Louisville-Duke game drawing 15.7 million viewers in prime time. But because the game started outside prime time, it is not counted in the rankings. CBS said the game scored a 9.4 household rating, up 21 percent from the comparable game last year.

Earlier Sunday, Michigan's defeat of Florida scored a 6.2 household rating, up 17 percent from the comparable game last year.

So far, the overall tournament is scoring a 6.7 household rating, up 8 percent from last year.

The prime-time averages: CBS with 10.9 million, NBC with 4.6 million, ABC with 3.7 million and Fox with 2.6 million for repeats. CBS handily won the 18-to-49 age group. Among broadcast networks, CBS had the most viewers in each time slot despite the 45-minute delay.

CBS offered new episodes of "60 Minutes" (11.7 million viewers), "The Amazing Race" (9.4 million) and "The Good Wife" (8.6 million). NBC's strongest show was a 9 p.m. repeat of "The Voice" with 5.3 million, followed by "The Celebrity Apprentice" with 4.7 million. ABC's best was "Revenge" with 5.5 million.

More cable ratings: HBO's "Game of Thrones" averaged 4.4 million viewers in its 9 p.m. season premiere. It was the biggest audience ever for "Thrones," surpassing the previous high of 4.2 million for last season's finale. Despite the heavy competition, "Thrones" was up 13 percent over last season's premiere.

In Orlando, "The Walking Dead" drew 203,700 viewers for its third-season finale.

The news magazine "60 Minutes" was No. 2 with 194,300 viewers. (The Louisville-Duke game, which started before prime time, gave the CBS lineup a big boost with 209,100 viewers. The Michigan-Florida game before that averaged 206,100 viewers.)

"The Bible" had 173,100 viewers. Rounding out the top five were two CBS shows: "The Amazing Race" with 132,000 viewers and "The Good Wife" with 115,600.

How popular is "The Walking Dead" in Orlando? The "Talking Dead" chat show after the season finale drew 113,200 viewers and a repeat of last week's episode at 8 p.m. attracted 94,900.

Nationally, "Talking Dead" drew 5.2 million viewers, its best showing ever.

AMC President Charlie Collier, in a statement, gushed: "Two words: Grateful. Dead. It's a joy that we get to work with such tremendous talent to make 'The Walking Dead' and 'Talking Dead' come to life for audiences that continue to engage and grow. In just three seasons, 'The Walking Dead' has become a pop-culture phenomenon, entertaining millions of passionate viewers and obliterating traditional lines between cable and broadcast television."