The hit Disney+ series Percy Jackson & The Olympians continues to build excitement with major new casting news for Season 3. According to Deadline, three notable actors are joining the upcoming season in guest roles.
Holt McCallany known for his intense dramatic roles will play Atlas, one of the most powerful Titans in Greek myth. David Costabile, a character actor familiar to TV fans, has been cast as Dr. Thorn. And acclaimed actor Jesse L. Martin will portray Frederick Chase, Annabeth’s father.
These new additions add fresh depth and intrigue to the series as it adapts the next story from Rick Riordan’s beloved books.
What We Know About Season 3
Adapting The Titan’s Curse
Season 3 will continue the Disney+ adaptation of Rick Riordan’s Percy Jackson book series, following The Sea of Monsters from Season 2 and moving into the storyline from The Titan’s Curse.
The series’ showrunners and cast have been teasing major story developments, including mythology-heavy elements and new characters. Fans can expect more epic quests, deeper relationships, and significant challenges for Percy and his friends.
New Characters and What They Mean
Atlas — A Titan With a Heavy Burden
In Greek mythology, Atlas is a Titan condemned to hold up the sky. The character’s inclusion signals major stakes for the series. Holt McCallany known for roles in Mindhunter and The Iron Claw will step into the role, bringing presence and gravitas to one of Percy Jackson’s most formidable foes.
Atlas has featured significantly in The Titan’s Curse novel, interacting with Percy and the other demigods in a storyline tied to loyalty, power, and ancient prophecy.
Dr. Thorn — Mysterious Antagonist
David Costabile will play Dr. Thorn, a character associated with dangerous forces in the story. While full details about Thorn’s role are still under wraps, the character’s presence in the books involves dark magic and perilous encounters.
Costabile’s casting builds anticipation. He’s known for portraying complex, often sinister figures, and Dr. Thorn’s introduction indicates Season 3 will lean into darker shades of the Percy Jackson world.
Frederick Chase — Annabeth’s Father
Jesse L. Martin will portray Frederick Chase, the father of Annabeth Chase. In the original books, Frederick is a seasoned traveler and archaeologist whose actions have deep emotional impact on Annabeth’s character.
Annabeth’s relationship with her father adds emotional depth to her journey, and Martin’s casting has already sparked excitement among fans. His previous roles in Law & Order and The Flash have shown emotional range that could enrich the character’s portrayal.
Returning Cast and Story Structure
Main Characters Returning
Season 3 will bring back the main cast, including:
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Walker Scobell as Percy Jackson
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Leah Sava Jeffries as Annabeth Chase
These actors anchor the series as the central trio of demigods facing mythic danger and growing personal challenges.
Other familiar faces like Clarisse La Rue, Luke Castellan, and Tyson are expected to return as Season 3 adapts the next book’s storyline.
Production and Timeline
Filming for Season 3 began in August 2025 in Vancouver, British Columbia and is expected to continue into early 2026.
The series has followed a pattern of filming and release delays, but fans hope the new episodes will arrive by late 2026, following the December 2025 launch of Season 2.
Story Expectations From Fans
Anticipated Plot Beats
The Titan’s Curse the source material for Season 3 brings new challenges for Percy and his allies. They confront powerful foes, navigate tricky alliances, and search for missing gods.
Fans are particularly excited to see how the show handles some key mythological elements that are central to the book, including the Hoover Dam scene and the broader conflict with the Titans.
Fan Reactions to Casting News
Casting announcements have sparked strong reactions online. Fans on social platforms have expressed excitement, especially about Jesse L. Martin taking on the role of Frederick Chase and Holt McCallany’s presence as Atlas.
Some discussions focus on how these actors might shape iconic characters from the books, while others debate possible changes or adaptations in the TV version.
How This Fits Into the Series Overall
A Growing World of Myth and Adventure
Since its debut, Percy Jackson & The Olympians has become one of Disney+’s most popular fantasy series. Season 1 and Season 2 have earned praise for bringing Rick Riordan’s world to life, with high viewership and strong streaming performance.
The series adapts one book per season, giving each story room to breathe and allowing complex characters and themes to develop over time. Season 3’s casting and story promise to continue this pattern.
Looking Ahead: Release and Expectations
Although an official release date for Season 3 has not yet been announced, the early casting news and ongoing production suggest a late-2026 debut.
With returning heroes, powerful new villains, and deep character moments, this season aims to satisfy longtime fans of the books and show alike.
Frequently Asked Questions (FAQs)
Who is joining the cast of Percy Jackson Season 3?
Actors Holt McCallany, David Costabile, and Jesse L. Martin are joining as Atlas, Dr. Thorn, and Frederick Chase respectively.
What book will Season 3 adapt?
Season 3 is expected to adapt The Titan’s Curse, the third novel in Rick Riordan’s Percy Jackson series.
When did production start on Season 3?
Filming began in August 2025 in Vancouver, Canada.
Will the main cast return?
Yes. Walker Scobell, Leah Sava Jeffries, and Aryan Simhadri are expected to return as core characters.
Is there a release date yet?
No official date has been announced, but industry sources suggest a possible late-2026 release.