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Big Mouth Season 4 - What We Know So Far

Netflix's Big Mouth has been finding new, inventive ways to discuss puberty for three seasons. The side-splittingly funny, yet surprisingly soulful animated series looks into the lives of young men and women like Nick Birch (Nick Kroll), Andrew Glouberman (John Mulaney), Jessi Glaser (Jessi Klein), and Missy Foreman-Greenwald (Jenny Slate), as they enter their turbulent puberty years, personified as hormone monsters like Maury (Kroll) and Connie (Maya Rudolph). 

While Big Mouth is decidedly not a Netflix show you should watch in front of your kids, its novel approach of anthropomorphizing some of the most awkward and confusing feelings a person can experience has proved to be a winning concept. In fact, the show's surreal humor is so highly rated that Big Mouth holds a solid 99 percent critical rating on Rotten Tomatoes

With plenty of opportunities to explore and the entire spectrum of human emotion to draw inspiration from, the show seems primed to continue its winning run into its fourth season. Let's take a look at what we know about the Big Mouth season 4 release date, episodes, and cast so far. 

What's the release date of Big Mouth season 4?

Big Mouth has followed a fairly reliable schedule since season 1 dropped on Netflix on September 29, 2017. Season 2 followed almost exactly a year later, on October 5, 2018. The show then broke the mold somewhat with the "My Furry Valentine" special, which was released a week before Valentine's Day on February 8, 2019. However, the third season proper returned to the expected schedule, and premiered on October 4, 2019.

Season 4 is obviously running a little bit late from this schedule, but don't worry: it's still coming. In fact, you can expect it pretty soon. According to the official trailer for Big Mouth season 4, the show will make its bombastic return on December 4, 2020. What's more, the two seasons after that are a lock, as well. In 2019, Big Mouth was renewed for no less than three seasons, so unless something truly drastic happens, the show's sailing should be smooth for years to come.  

Who's in the cast of Big Mouth season 4?

The trailer confirms that most of the core characters return for Big Mouth season 4. Co-creator Nick Kroll will naturally return to voice Nick Birch, Coach Steve, Lola Skumpy, and a multitude of other roles. John Mulaney, Jessi Klein, Jason Mantzoukas, and Maya Rudolph are also back as Andrew Glouberman, Jessi Glazer, Jay Bilzerian, and Connie the Hormone Monstress. While Kroll's Maury the Hormone Monster doesn't appear in the trailer, the character shows up in the teaser posted on the show's official Twitter account, so it's probably safe to say that he's back as well. 

Meanwhile, Missy Foreman-Greenwald is also returning, but her voice actress, Jenny Slate, is stepping away from the role before the season is over, according to VarietySlate has stated that "Black characters on an animated show should be played by Black people," and as such, writer and comedian Ayo Edebiri will take over Missy's role in the ninth episode of the season. 

As is the show's custom, the new season will also feature copious new characters and big-name guest stars (per Deadline). The most significant addition would appear to be Maria Bamford's Tito the Anxiety Mosquito, a particularly strong negative emotion monster who seems to follow in the footsteps of previous major "villains," such as Jean Smart's Depression Kitty and David Thewlis' Shame Wizard. The season will also feature Zach Galifianakis as Gratitoad, as well as a star-studded guest cast that features names like Seth Rogen, John Oliver, Maya Erskine, Paul Giamatti, Lena Waithe and Sterling K. Brown.

What are the episodes of Big Mouth season 4 about?

Big Mouth season 4 will have 10 episodes, and binge-watchers will be delighted to find out that the entire season will drop on Netflix on December 4. The season trailer shows the characters at a summer camp, exploring all sorts of new opportunities, insecurities and, of course, anxieties. As such, Tito the Anxiety Mosquito seems to play a massive role, as the insect is seen interacting with multiple characters — and even attacking them as a giant, three-headed monster.   

That being said, it looks like the season 4 episodes will explore plenty of other themes around growing up and finding your place in the world, as the Big Mouth characters gear up to start 8th grade. The trailer shows Jessi struggling with her period, Matthew (Andrew Rannells) struggling to find acceptance from his father, Jay and Lola (Kroll) starting a relationship, Nick and Andrew feuding over a summer camp friend, and Missy ditching her signature dungarees. Oh, and the trailer also features prominent post-apocalyptic scenes that seem to happen in the future, and even teases the end of the world. Unless the show's planning to shake up its premise in a pretty serious way, this seems to indicate at least one high-concept fantasy episode, in the vein of season 3's cool superhero showdown. 

In other words, Big Mouth is about to once again show you just how weird puberty can get — and frankly, December 4 can't arrive fast enough.