Many of the longest-running TV shows in recent memory also happen to be considered some of the best horror TV shows of all time. One of the all-time longest-running of the bunch is Ryan Murphy and Brad Falchuk’s twisted, Emmy-winning series, "American Horror Story," which is about to give its competition a run for their money by entering horned-head first into Season 12.

Perhaps the key as to why this acclaimed anthology TV show — which is also one of the best horror TV shows streaming on Hulu — has captivated audiences obsessed with all things mystical and macabre for so long is that each season tells a different story with a brand new setting, cast of characters, a distinct tone, and (most importantly) a creepy new theme. Learn all that we know about the theme for "American Horror Story" Season 12 — as well as the new and familiar faces appearing in the cast and who is running things from behind the scenes — in our guide below.