The Walking Dead” and “Empire” were the most tweeted about linear TV series of the 2015-16 season, according to Nielsen.

In a post on its company site, the measurement firm detailed the television shows and personalities that had the biggest impact on Twitter throughout the season, which ended May 29. AMC’s “The Walking Dead” was the most tweeted about show on cable or broadcast, averaging 435,000 tweets per episode. Fox’s “Empire” was second at 387,000.

“The Walking Dead” was the highest rated scripted show on TV for the season in the 18-49 demo, while “Empire” led all of scripted broadcast television.

On digital streaming services, “Fuller House” led all series with 1.3 million tweets in its first 30 days on the air. Because of Netflix and other streaming services’ tactic of releasing all episodes of a show’s season simultaneously, Nielsen applied different different measurement criteria for their shows than it did to broadcast.

Super Bowl 50 on CBS Feb. 7 was the subject of the most used hashtag for a sports event, #SB50, which was employed 3.7 million times. Rapper Kanye West received the most mentions of any Twitter user in a series episode, with 489,000 mentions during his “Saturday Night Live” appearance Feb. 13.

Among TV specials, the 2016 Grammy Awards on CBS Feb. 15 was No. 1, drawing 7.6 million tweets. ABC’s Academy Awards telecast Feb. 28 was close behind at 7.2 million.

Aside from the Super Bowl, Los Angeles Lakers star Kobe Bryant’s final game April 13 was the most tweeted about sporting event, with 4.6 million tweets. The hashtag associated with the game, #MambaDay, was used 851,000 times.

The Democratic primary debate on CNN Oct. 13 was the most tweeted about of the presidential debates thus far with 2.8 million tweets. CNN’s Republican debate Sept. 16 was No. 2 with 2.5 million tweets.