On the next episode of American Horror Story: Coven, viewers will discover that there is a mole inside the coven.

Wednesday night's episode of American Horror Story: Coven is titled The Axeman Cometh and will feature many revelations. Viewers, and possibly the characters themselves, will find out that there is a mole in the coven who is actually a witch hunter, according to a new report by TV Guide.

The report also claims that the audience has already witnessed a big clue as to which character is betraying the others: they have already killed a witch onscreen. The only witch deaths seen so far have been at Fiona's (Jessica Lange) hand, though the chances are unlikely of her being a witch hunter.

The more likely candidate for witch hunter is Hank (Josh Hamilton), husband of Cordelia (Sarah Paulson). It has already been alluded to that he is an assassin of sorts and while his mistress Kaylee (Alexandra Breckenridge) did not reveal herself to be a witch, that fact may be covered in the episode.

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In other American Horror Story: Coven spoiler news, series co-creator Ryan Murphy recently tweeted that Stevie Nicks will be a special guest star later in the season. The Fleetwood Mac singer has been alluded to several times this season by Misty Day (Lily Rabe), who idolizes her. There is no word on whether or not she'll be playing herself or a new character.

American Horror Story: Coven airs Wednesdays at 10 p.m. on FX.

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Watch a promo for episode six of American Horror Story: Coven below:

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