The Summer I Turned Pretty Season 3 Episode 1: Everything You Missed In "Last Season" And The Shocking Cabo Secret

The highly anticipated final chapter of the love triangle that defined a generation has officially begun. *The Summer I Turned Pretty* Season 3, based on Jenny Han’s third and final novel, *We’ll Always Have Summer*, premiered on Prime Video with a two-episode launch on July 16, 2025. This season, consisting of an extended 11 episodes, immediately plunged fans back into the drama, leaving the idyllic days of Cousins Beach behind for the harsh realities of college life and a devastating secret that threatens to tear the Fisher brothers and Belly Conklin apart for good.

The season opener, titled "Last Season," set a dramatically different tone, moving away from the sun-drenched beaches to a new, uncertain setting. Fans were instantly confronted with the fallout of Belly’s choice between the Fisher brothers, and the episode did not hold back, establishing the emotional stakes for the final, heartbreaking journey. If you missed the explosive premiere, here is a complete breakdown of Belly’s new world, the plot’s major shifts, and the shocking revelation that changes everything.

The Summer I Turned Pretty Season 3 Main Cast: Full Biography Profile

The core cast returns for the final season, bringing their beloved characters to life one last time. Here is a look at the actors behind the iconic love triangle and Belly's brother, Steven Conklin.

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• Lola Tung (Isabel "Belly" Conklin)
  • Date of Birth: October 28, 2002
  • Place of Birth: New York City, New York, USA
  • Key Role: The central protagonist, caught between her childhood crush and her current boyfriend.
  • Fun Fact: *The Summer I Turned Pretty* was her breakout role, launching her career immediately after high school.
• Christopher Briney (Conrad Fisher)
  • Date of Birth: March 24, 1998
  • Place of Birth: Danbury, Connecticut, USA
  • Key Role: The brooding, emotionally complex older Fisher brother and Belly's first love.
  • Notable Credits: Briney is also known for his role as Aaron Samuels in the film adaptation of *Mean Girls* (2024).
• Gavin Casalegno (Jeremiah Fisher)
  • Date of Birth: September 2, 1999
  • Place of Birth: Dallas, Texas, USA
  • Key Role: The charming, easy-going younger Fisher brother and Belly's current boyfriend.
  • Notable Credits: Before joining the Prime Video series, Casalegno had roles in *The Vampire Diaries* and the film *Noah*.
• Sean Kaufman (Steven Conklin)
  • Key Role: Belly's protective older brother, who is navigating his own relationship with Taylor.
• Rain Spencer (Taylor Jewel)
  • Key Role: Belly's best friend and confidante, whose relationship with Steven is a major side plot.

"Last Season" Recap: Belly at Finch College and a New Reality

The premiere episode, "Last Season," immediately signals a massive shift in the narrative. Belly Conklin is no longer just a girl spending the summer at Cousins Beach. She is now a college freshman, a significant time jump that mirrors the beginning of the third book, *We’ll Always Have Summer*.

The College Move-In Drama: The episode opens with Belly arriving at Finch College to move into her dorm, a scene filled with awkward tension rather than excitement. Her best friend, Taylor, is also attending Finch, providing a much-needed anchor, but Belly’s relationship with Jeremiah Fisher is already under strain. The transition to college life, coupled with the long-distance dynamic, introduces a level of maturity and complexity the previous seasons only hinted at.

Jeremiah’s Cabo Secret: The central conflict of the episode, and the catalyst for the season’s major drama, revolves around a shocking secret Jeremiah has been keeping. While the series has always focused on the love triangle, this revelation immediately shifts the focus to the integrity of Belly and Jeremiah's relationship. The secret, which is hinted to involve a massive betrayal during a trip to Cabo, is the television adaptation’s dramatic entry point into the book’s major plot twist: Belly and Jeremiah’s rash decision to get engaged.

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The episode masterfully uses this secret to reintroduce the underlying tension between the brothers. Conrad Fisher, who is away at Stanford, remains a distant, yet powerful, emotional force. His presence is felt through his absence and the knowledge that he is the only one who truly understands the weight of the Fisher family legacy, especially after the loss of Susannah Fisher.

The Looming Engagement and the Book’s Dark Turn

For fans of the Jenny Han books, "Last Season" serves as the prelude to the most contentious period in Belly's life. The episode’s events directly lead to the pivotal, high-stakes drama of the impending wedding. The central question of the season is: Will Belly and Jeremiah actually go through with their engagement?

The Memorial and the Proposal: In the book, the engagement announcement happens during a memorial for Susannah, who passed away in Season 2. The series has carefully laid the groundwork for this accelerated timeline. Jeremiah's shocking secret, revealed early in the season, is the likely trigger for Belly’s impulsive decision, seeking to solidify a future that feels increasingly unstable. This plot point is a massive deviation from typical teen romance, raising the stakes and forcing all the characters to confront their adult responsibilities.

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Conrad’s Return and the Inevitable Conflict: The premiere sets up the inevitable return of Conrad from Stanford to Cousins Beach, likely to deal with the family's reaction to the engagement news. His perspective is crucial, as he is the one who initially broke Belly’s heart but remains the true endgame for many fans—the dedicated "Team Conrad". His forced proximity with Belly and Jeremiah will be the emotional powder keg for the remaining ten episodes. The final season's expanded 11-episode count gives the show ample time to explore the nuances of this complex love triangle and the emotional maturity required to make a final choice.

Topical Authority: Key Entities and Themes in Season 3

To fully grasp the depth of the final season, understanding the key entities and thematic elements is essential. The show’s topical authority is built on more than just the love triangle; it's about family, grief, and growing up.

• Cousins Beach: The central, almost mythical setting. In Season 3, it transforms from a place of pure summer joy into a battleground for the Fisher family's future and the site of Susannah's memorial.
• Finch College: Represents the shift to adulthood. Belly and Taylor's new life here signifies the end of their carefree summers and the beginning of real-world problems, including the pressures of long-distance relationships and academic stress.
• *We’ll Always Have Summer* (The Book): The source material that dictates the final outcome. Jenny Han’s vision for the ending is the ultimate destination, though the series often takes liberties with the journey.
• The Cabo Betrayal: A key plot device used by the show to accelerate the drama and provide a tangible reason for the breakdown between Belly and Jeremiah, which leads to the desperate engagement.
• Laurel Conklin: Belly's mother, whose own journey of grief and finding new love (perhaps with her publisher, as hinted in previous seasons) offers a parallel storyline of adult relationships.
• Team Conrad vs. Team Jeremiah: The enduring fan rivalry that fuels online discussion. The final season promises to deliver a definitive answer, solidifying the endgame couple and putting the debate to rest.
• Prime Video: The exclusive streaming platform where all 11 episodes of the final season are available, dropping weekly every Wednesday after the two-episode premiere.

With "Last Season" setting a dramatic, emotional, and mature tone, *The Summer I Turned Pretty* Season 3 is shaping up to be the most intense chapter yet. The shocking Cabo secret and the impending engagement promise a rollercoaster ride for Belly, Conrad, and Jeremiah, forcing them to finally decide who their future summer—and life—will be with.