The sixth season of American Horror Story begins on US TVchannel FX tonight (September 14), but audiences are still none the wiser about what to expect.
The producers of the award-winning show have broken with tradition by refusing to announcing the season's title ahead of the first episode's broadcast on American channel FX.
Each previous season has had a different subtitle revealing its setting, such as last year's "Hotel", or 2014's "Freak Show" (set in a circus).
This year, however, co-creator Ryan Murphy has somehow managed to keep the concept tightly under wraps. Here's everything we know - or think we know, or wish we knew - about the new series so far:
Lady Gaga is coming back
After winning a Golden Globe for her performance as a vampire countess in last year's 'Hotel,' the pop-star will be returning to the programme.
She hasn't dropped any hints about what's in store (after all, she has a famously good Poker Face), but we do know that she will be joined by series regulars Sarah Paulson, Evan Peters, Angela Bassett, Matt Bomer and Wes Bentley.
Cuba Gooding Jr (recently seen in The People vs OJ Simpson) is rumoured to be joining the cast, while Glee star Jacob Artist revealed on Instagram this week that he would be making an appearance, by sharing a photo of his copy of the script.
Usually, each season sees the regular cast appear as entirely new characters. But this won't necessarily be the case here: 'Hotel' saw Sarah Paulson briefly revive her character from the first season, 'Murder House.' Murphy has confirmed that American Horror Story has "a definite [single] universe, and all the worlds are collided," while hinting that this will be apparent in the new season. We may well see a few familiar characters make an unexpected comeback.
It's about mist (unless it isn't)
The new title is widely rumoured to be "The Mist", after this title briefly appeared on Rotten Tomatoes and TV Guide, but this has not yet been confirmed.
Some fans have taken this as a reference to Stephen King's 1980 horror story of the same name, which saw mist-shrouded creatures attacking a small American town. "The Mist" is also the title of a 15-second teaser for season 6, which shows a mis-shapen, humanoid creature crawling along a set of railway tracks.
However, both the supposed title and teaser may prove to be red herrings.
FX have released more than 20 such teasers for season six, and all but one of them are intended to mislead the viewer. According to FX chief John Landgraf, "One is accurate, all the rest are misdirect." In other words, we still don't know anything.
It might be about Charles Manson
One theory suggests the Manson family may be the focus of the new series.
The show's creator, Ryan Murphy has been saying that he wants "to do an entire season about the Manson case" since 2013, and a series of clues in the promotional material appear to support this theory.
Or it could be about a lost colonial town
A more likely theory hinges on the word "Croatoan", seen carved into a tree in photos leaked from the show's set. It refers to an eerie true-life mystery, as word appeared on a tree outside the remains of a 17th century colonial settlement of Roanoke in North Carolina, after all the inhabitants had disappeared.
American Horror Story has referenced early American history in previous seasons, most notably in Coven, which drew heavily on the Salem Witch Trials.
But it's probably about children, or something eerily close to children
Murphy, has confirmed that the new season will feature "elements of children" - a far more worrying phrase than just "children".
Even though the early teasers may well be meaningless (see above), this does chime with several of them: one features a Children of the Corn-esque scene of schoolchildren, working at desks in the middle of a cornfield; another shows a living doll; a third shows a family with a young girl in a prairie landscape.
More convincingly, photos of the set leaked by TMZ show a large, purpose-built structure that could be either a school or an orphanage, with a school-bell hanging outside.
Glancing references to "the Thatcher School" in Hotel could suggest that this school was being lined up as the setting for the next series.
Whatever it is, there are two of it
"Both things that we're writing right now - we haven't yet declared the winner - will have a different form than we've ever done, so we're excited about that," Murphy said earlier this year.
This could refer to a dual time-frame: Landgraf told reporters in January that the new season would be "set in two time periods, but principally in the present."
In the meantime, fans will have to wait for the first episode and - we hope - provide the answers to a few of these questions.