Steven Yeun and Lauren Cohan star on AMC's "The Walking Dead." (Tina Rowden/MCT)

The Season 3 finale of AMC’s zombie drama “The Walking Dead” unearthed 12.4 million viewers Sunday night, putting to rest for all eternity further argument about the show’s revolving door of showrunners wrecking the franchise.

While “TWD” was clocking those 12.4 million viewers, about 9 million instead watched CBS’s “The Good Wife,” another 5.4 million chose ABC’s “Revenge,” 5.3 million sat inexplicably glued to NBC’s rerun of singing competition “The Voice,” and 3 million preferred to watch repeats of Fox comedies “Family Guy” and “American Dad.”

Immediately after its telecast of “The Walking Dead,” AMC’s live “The Talking Dead,”, in which fans and host Chris Hardwick dissected and probed “TWD’s” season finale, hung on to 5.2 million of its viewers.

At 10, “The Talking Dead” beat HBO’s Sunday season debut of its sex-and-swords drama “Game of Thrones. ”

Undaunted, HBO preferred to focus on the fact that its “Game of Thrones’” premiere had averaged 4.4 million viewers, besting the show’s previous high of 4.2 million viewers scored at last season’s finale, as well as last season’s premiere crowd of 3.9 million.

“Two words: Grateful. Dead,” AMC president Charlie Collier prattled yesterday, alienating Deadheads everywhere. On the other hand, those super-fans of that ancient rock band have aged out of AMC’s target audience -- 18-to-49-year-olds – and don’t matter to AMC’s bottom line.

“In just three seasons, ‘The Walking Dead’ has become a pop-culture phenomenon…obliterating traditional lines between cable and broadcast television,” Collier continued happily.