FX's American Horror Story: 13 premieres September 24 with three episodes on opening night. The installment contains thirteen roughly half-hour episodes, making it substantially shorter per episode than the anthology's traditional format.

Additional episodes will roll out in batches through the thirteenth and final chapter at the end of October, landing just before Halloween.

The anthology is no longer pretending its old nightmares live separately

American Horror Story has connected its seasons for years. Sometimes those links were small references; Apocalypse made the relationship between Murder House and Coven impossible to ignore. Season 13 turns that connective tissue into the main event.

FX has confirmed the return of Constance Langdon, Cordelia Goode, Madison Montgomery, Marie Laveau, Rubber Man, Twisty the Clown and Kai Anderson among other familiar characters.

The official story remains deliberately broad. A present-day crisis pulls older figures back into the narrative while the number 13 begins appearing with increasingly sinister consequences.

Sarah Paulson and Evan Peters are not returning for only one character

This is more than a parade of isolated guest appearances. Sarah Paulson revisits multiple roles from her history with the show, including Cordelia Goode.

Evan Peters returns as several characters as well, including Tate Langdon, Kai Anderson and James Patrick March. The structure effectively asks the show's longest-serving performers to interact with different pieces of their own AHS past inside one new continuity.

Jessica Lange is back after an eight-year absence, with FX confirming another appearance as Constance Langdon, the Murder House character she later revisited in Apocalypse.

Coven appears to be one of the season's main anchors

The marketing is not hiding its witches. Paulson returns as Cordelia, Emma Roberts as Madison Montgomery and Angela Bassett as Marie Laveau. Gabourey Sidibe, Frances Conroy and other performers closely associated with Coven are also part of the ensemble.

FX is advertising the official trailer with the phrase “We’re so back, witches,” while the footage leans heavily on pentagrams, Supreme imagery and familiar supernatural iconography.

The crossover is much broader than Coven, however. John Carroll Lynch returns as Twisty the Clown, Jamie Brewer as Addie Langdon and Mena Suvari as the Black Dahlia, with Hotel and Cult also feeding characters into the new story.

A new protagonist keeps this from becoming only a reunion special

Joey Pollari plays Ben DeSoto, a new hospice worker trained by Constance Langdon to care for a wealthy elderly patient with a mysterious history.

Disney positions Ben as the audience's main entry point into the season. Longtime viewers can recognize the returning mythology immediately, while someone who has not watched all 132 previous episodes still has a new character whose investigation can carry the plot.

Paul Anthony Kelly and John Waters are also among the newcomers. Kathy Bates, Billie Lourd, Leslie Grossman, Avantika, Madelaine Petsch, Tig Notaro and Orlando Jones are part of the much larger ensemble.

Thirteen episodes now mean half-hour chapters

The shorter runtime may be the season's most meaningful structural change. American Horror Story has often had enough ideas for several shows at once, with momentum sometimes weakening once those ideas start competing for space.

Thirteen half-hour episodes give this installment more individual chapters but less total room to wander. That could suit a crossover built around rapid returns, overlapping characters and shorter narrative movements.

It could also create the opposite problem if the show tries to give every returning favorite a substantial arc. There are enough recognizable names here to populate several seasons.

Season 13 is increasingly looking like a celebration of the show's entire history

American Horror Story began in 2011, and FX says the anthology has now generated more than 700 million streaming hours worldwide. The thirteenth installment is openly using that accumulated history as part of its appeal.

Instead of introducing another completely isolated nightmare, Ryan Murphy and Brad Falchuk are treating the new season as a collision between mythologies the show has been building since Murder House.

The question is no longer simply what this year's monster will be. It is how many old ones can return before the house becomes too crowded.

American Horror Story: 13 premieres September 24 on FX and Hulu with three episodes.