Before Twitter, What Did TV Fans Do To Save Their Favorite Shows?

The recent saga around Brooklyn 99, FOX's critically-acclaimed darling about a New York City police precinct, felt like a roller coaster for fans. The network cancelled it in advance of its sixth season, only for it to be scooped up at the 11th hour by rival network NBC. Fans rejoiced on Twitter, the platform on which they'd been cursing FOX for days prior. It's a story with a happy ending (PS, NBC, can you resuscitate Happy Endings while you're at it?). But, it begs the question: Before Twitter...