This Is Us Season 4 Release Date, Cast, Story, And Theories

This Is Us fans need not worry about their favorite show returning to television, the NBC drama has been renewed for a fourth season. Truth be told, the network also renewed the series for a fifth and sixth season. It's even possible the show could continue on past Season 6, according to TVLine, as no decision has been made regarding the end of the series.

While it's not known just what these later seasons will entail, series creator and writer Dan Fogelman and many of the This Is Us cast have spilled some secrets about what's to come throughout the 18 episodes of Season 4. We've compiled all the This Is Us details — we're talking fan theories, confirmed storylines, new cast members, cliffhangers, twists, and more! — and we have to tell you: The fourth season is where it's at. Here's everything you need to know This Is Us Season 4.

Note: This Is Us Season 3 and 4 Spoilers ahead.

The first episode of This Is Us Season 1 ended with the audience realizing that there were two timelines at play: the past and present. As The Wrap recapped, Rebecca and Jack's story took place in the past whereas Kate, Randall, and Kevin's stories were in present day. The audience also learned that the Big Three are Rebecca and Jack's adult children. This surprise may sound impossible to rival, but Mandy Moore told the publication that the twist in This Is Us Season 4's first episode "feels analogous to the pilot."

Series creator Dan Fogelman also compared the fourth season to the show's first. In May 2019, he told Entertainment Weekly, "In some ways because characters are restarting — and Randall and Beth's family is moving, and Toby and Kate are bringing a baby home, and we're going to continue the Jack and Rebecca origin story — it's going to feel in some ways almost like a version of season 1 in the middle of our series, in that we're starting these new stories after we've told a lot of the stories in full for the past three seasons."

Although Jack and Rebecca are central to the series, Jack's past is no longer going to be a recurring theme in This Is Us Season 4. "I think a lot of the mystery of Jack has been kind of told by the end of this season [Season 3], but it doesn't necessarily mean it's any less interesting to go and live with those younger families," series creator Dan Fogelman told Good Housekeeping in late July 2019. "We are starting to move towards new chapters in season 4 with The Big Three ... some of the more mysterious or dramatic pulls of the series might start falling into the hands of some of our other characters."

As it happens, This Is Us is only going to get bigger — and likely better — as it continues. "We have a big plan of expansion," Fogelman confirmed when speaking to the publication. "The show is intended to be the expansive ways our lives evolve and connect us with our people ... That starts happening more and more." Is the anticipation killing you too?

At least one part of Dan Fogelman's big expansion plan involves the addition of new cast members. TVLine confirmed that the NBC drama picked up Jennifer Morrison, who is perhaps best known for her roles as Allison Cameron in House and Emma Swan in Once Upon a Time, for a "major recurring role" in This Is Us Season 4. According to the publication, the details about Morrison's character have been kept concealed, but she is expected to have a "substantial" part. Hmm.

Although the series is keeping the particulars about the actress' role a secret, there's no containing the excitement regarding her casting. Morrison shared a screenshot of the TVLine article on Twitter along with the caption "THIS IS US!!!!" — plus three heart emojis — so suffice it to say, she's ecstatic to have joined the team. The This Is Us Twitter account tweeted back at the star, "Welcome to the family." Before long, comments from equally excited fans poured in.

Series creator Dan Fogelman didn't reveal which characters would be going through a "very scary period" in his interview with Entertainment Weekly, but there's good reason to believe Toby and Kate will be among them.   

Of the couple's marriage, actress Chrissy Metz, who plays adult Kate on This Is Us, told Good Housekeeping, "We've seen a lot at the surface with stuff, and things start to get a little more serious and they realize that it's not all fun and games. We [Kate and Toby] can't protect ourselves with humor and sarcasm." The actress also implied that Toby is going to face some very "dark days." Being new parents is also going to present its challenges for the couple. "We're going to see Kate and Toby co-parenting and how that will change, if that will change the dynamic in their relationship," Metz explained in an interview with E! News.

Although the audience knows that Rebecca and Miguel reconnected online many years after Jack's death, the story behind their relationship had not really been a major plot point. That will change in This Is Us Season 4, however. If you're a fan of Miguel, you likely noticed that he was absent in the flash-forward sequence of the Season 3 finale.

Although series creator Dan Fogelman says Season 4 won't bring clarity to that part of the flash-forward scene, he does promise we'll see more of Miguel. "We have a lot more story to tell at first, Rebecca and Miguel coming together, as well as how Miguel played a role in Jack's origin story, around the time of meeting Rebecca post-Vietnam," Fogelman told Entertainment Weekly. "So there's a lot we're doing still there before we get to the Miguel mystery, as [Entertainment Weekly] called it."

Fogelman also told the publication, "Everybody can become the hero at the different chapter of a story, and I think Miguel has a road in front of him that's going to be very exciting and rewarding."

Season 3 ended with that huge cliffhanger about Rebecca, and, well, we want answers! Unfortunately, we probably won't be getting them in This Is Us Season 4. Just as creator Dan Fogelman told Entertainment Weekly that there is "a lot more story to tell" before delving into the "Miguel mystery," there's a lot more story to tell before we can resolve the Rebecca mystery at all. In fact, we may be at least two seasons away from those answers.

Sterling K. Brown, who plays adult Randall, told Entertainment Weekly that the flash-forward scene in the This Is Us Season 3 finale "is more than likely the last day of [the] series." He added, "So, we're building toward the end of the show." However, Season 4 will likely explore clues about what's happening to the elderly Rebecca. "There's the chalk, and there's the Pin the Tail on the Donkey, there's all these things that don't seemingly make sense, but there's a method to the madness," Brown told Entertainment Weekly. Nevertheless, Mandy Moore told TVLine that Season 4 isn't "going to dip into that world with [her] character too much."

This Is Us fan theories are giving us life. Ahead of the Season 3 finale, one Reddit user speculated that Jack's brother Nicky would come back, possibly to "connect with Baby Jack or perhaps redeem himself in [some way] involving little Jack." This theory became even more likely after the finale aired, considering Nicky is in pictured in the room with a possibly dying Rebecca.

There are also plenty of theories about Kevin's love life. The Season 3 finale introduced us to Kevin's blonde-haired son, but the audience was left in the dark about his mother's identity. Some fans think Kevin will end up getting back together with Sophie. After all, Kevin "always gets what he wants," right? Others think Jennifer Morrison will play Kevin's love interest and the eventual mother of his child. So many possibilities!

Theories about Toby and Kate also abound. Will Toby be suffering from paternal postpartum depression in Season 4? That's the theory one Reddit user posed. Will Toby and Kate split up? Some think that because Chrissy Metz used the term "co-parenting" in her interview with E! News that the couple is headed for Splitsville.