Juliette takes on a daunting work assignment, Chloe's meddling threatens her friendship with Madisson, and Kelsey's future with Garrett is jeopardized by her ex.

Madisson distances herself from the group, Alyssa's mom worries about her daughter's relationship, and unresolved feuds take center stage at Chloe's Friendsgiving dinner.

Brandon faces a decision about his future, Madisson surprises her friends and family with an announcement, and Kelsey questions Juliette's intentions.

Jeannie Mai hosts as the Siesta Key cast virtually looks back at breakups, makeups and blowups from Season 3, and the group shares relationship updates, shocking secrets and more.

Brandon embraces fatherhood, Chloe reinvents herself, Madisson worries about the age difference in her relationship, Amanda holds a film screening, and Kelsey confronts Juliette.

Chloe tries to repair broken friendships, Kelsey shares a joke that creates a bigger rift with Juliette, and Sam commissions a painting that leaves everyone speechless.

Madisson considers a prenup after a discussion with her father, Camilla and Brandon rehash their difficult past, and Chloe struggles to find support from Amanda and Juliette.

Camilla's flirting leads Brandon to a confrontation, Juliette works out the details of her swimsuit line, and Madisson's anxiety rears its head as everyone prepares for an island vacation.

Chloe makes a shocking announcement, Camilla confronts Brandon about hooking up with Jordana, Amanda is caught between Juliette and Kelsey, and Madisson invites Cara to the island.

Cara makes waves when she tries to make amends with the group, Sam and Juliette don't see eye to eye, Garrett shows his romantic side, and tempers flare at Kelsey's swimwear photoshoot.

Joe and Stef discuss their complicated situationship, Brandon's music video premiere party goes off the rails, and Juliette loses control and shocks everyone.

After Juliette's sudden departure, the vibe on the island changes, Amanda and Tate grow closer, Kelsey and Garrett see a different side of Cara, and Madisson focuses on her mental health.

Madisson makes a big decision about her wedding, Brandon throws a baby shower for Quincy, and Chloe returns with hopes of mending Juliette's and Kelsey's friendship.

Juliette takes charge of her business and hopes to make amends with Kelsey, Jordana wants more from Brandon, and Sam has a request for Juliette as they celebrate their one-year anniversary.

At Madisson's empathy-themed birthday party, Chloe's apology to Cara falls flat, then Juliette considers moving in with Sam, and Tate's secret online life goes public.

Chloe hosts an astrology-themed event, Brandon ponders his custody options, Kelsey is uncomfortable at Juliette's swimwear launch party, and Amanda loses patience with Tate's dishonesty.

Juliette is worried about her relationship as she considers moving out of Sam's house; Chloe has a new boyfriend to impress, but issues with Jordana and Cara test her; Brandon apologizes to Camilla for his past indiscretions.

As Juliette takes steps to move out, her relationship with Sam worsens. Kelsey is lonely in the key. Chloe worries that the groups’ drama will scare Chris away. Jordana throws an art show revealing a deeper side of her.

Juliette and Sam’s tension finally reaches its breaking point. Madisson is overwhelmed when she begins to prep for the wedding. Brandon thinks he’s ready to hang out with the group again, but he’s concerned about seeing Jordana.

Juliette is shocked that Sam moves on so quickly after their break up; the whole group chooses sides between Juliette and Sam, especially Jordana and Cara; Kelsey wonders about life outside of Florida, but Max is hesitant.

Juliette wants to get over Sam while she’s in Paris, but it’s not as easy as she hoped. Sam introduces Meghan to the group among unaccepting friends. Kelsey and Will are concerned about Garrett and Kenna’s relationship.

Juliette thinks she’s over Sam, but seeing him move on with other women changes everything. Brandon struggles with figuring out custody arrangements with Delainey. Cara is frustrated that Michael hasn’t said “I love you” yet.

Juliette is hesitant about rekindling things with Sam. Brandon juggles his son, career, Delainey, and a new relationship. Lexie is stuck in the middle of supporting her best friend, Juliette and her boyfriend’s best friend, Sam.

Juliette’s friends disapprove of her getting back with Sam, and she has to make a difficult decision. Sam and Chloe have conflicting ideas about what’s best for Juliette. Chloe contemplates taking the next big step with Chris.

The girls visit Madisson in LA. A video of Juliette and a mystery guy makes its way around the group. Sam moves on from Juliette, and it brings him back to a familiar face. Kelsey struggles with her relationship and a possible career change.