What do ?Saturday Night Live,? ?Roseanne,? ?Grey?s Anatomy? and ?The Walking Dead? have in common? How much love they get on Twitter. SFGate repots The social media platform shared its year-in-review data with TheWrap Wednesday, revealing which TV shows were the most tweeted about in 2018. Topping the list was the NBC sketch series, followed by the now-canceled Roseanne Barr-led comedy in second place, with Ellen Pompeo?s TGIT staple coming in third, and the AMC drama coming in fourth.