We’ve been dreading the dissolution of the Mikaelson family, but it sounds like things are going to finally start unraveling in Season 1, Episode 15 (“Le Grand Guignol”). We long guessed that the big secret Rebekah and Marcel were hiding from Klaus was that they were the ones responsible for bringing their horrible father, Mikael, to New Orleans back in the ‘20s — and now it sounds like the hybrid himself is about to learn the news.

According to Merriam-Webster, “Le Grand Guignol” refers to a small Parisian theater that specialized in dramatic entertainment featuring the gruesome or horrible. Sounds like we’re in for some pretty terrible things in this episode. In fact, we happen to know that Mikael will appear in the episode.

According to the synopsis below, Klaus (Joseph Morgan) knows all about Rebekah (Claire Holt) and Marcel’s (Charles Michael Davis) secret, and he’s going to confide in Cami (Leah Pipes) for support. Meanwhile, Marcel and Bex are going to try and convince Thierry to help them take down the witches while Elijah (Daniel Gillies) teams up with Monique, and Hayley (Phoebe Tonkin) confronts Celeste in order to reverse the curse on her werewolf clan.

Check out the full synopsis for the March 4 episode:

"In a series of flashbacks to 1919, Klaus opens up to Cami and reveals details of the devastating secret Rebekah and Marcel were trying to keep from him. Elijah forms an unlikely alliance with Monique (guest star Yasmine Al Bustami) and asks for her help in locating Sabine (guest star Shannon Kane). Elsewhere, Thierry (guest star Callard Harris) is reluctant to get involved when Marcel and Rebekah approach him with a plan to take down the witches. Meanwhile, in the bayou, Hayley is at her wits’ end and holds Sabine hostage in an attempt to get information that will reverse the curse on Phoebe’s werewolf clan."

What do you think will go down in this episode? Hit the comments and let us know!

The Originals airs Tuesday nights at 8 p.m. ET on The CW.

Carson Blackwelder is an Assistant Editor at Wetpaint Entertainment. Follow him on Twitter and Google+!