Sunday's shocking episode of "Game of Thrones" was a rating's record for the HBO series.
6.3 million viewers tuned in for King Joffrey's "Purple Wedding" episode.
The season 4 premiere is currently the most-watched episode of the show. It was watched by 6.6 million.
The second episode of the fourth season delivered an unexpected ending that resulted in the hashtag #PurpleWedding to trend in the U.S.
SEE ALSO: Fans are going crazy over Sunday night's episode of "Game of Thrones"