The Mikaelson siblings and their enemies are back in the upcoming episode of "The Originals" season 3 after a brief hiatus.

In the upcoming episode titled "Alone with Everybody," all of the enemies of the Original vampires will flock to New Orleans to kill Klaus (Joseph Morgan) after learning that a lone white oak bullet still exists. This will prompt his siblings to start hiding in their compound to save their lives, as suggested by Elijah (Daniel Gillies).

But aside from the threat to Klaus's life because of their enemies, the Mikaelsons will also face another threat brought by one of their own.

According to reports, their brother Finn (Casper Zafer) will resurface. This means trouble for his siblings, since they do not see each other eye-to-eye because of Finn's beliefs that they should stop drinking human blood and live as witches just like him and their mother Esther (Sonja Sohn).

Could this mean that another internal war is brewing between the original vampires, led by Kol (Nathaniel Buzolic), while other people around them are looking forward to bringing their entire clan to their ultimate end?

If Finn goes into battle, he could be supported by his lover, Davina (Danielle Campbell), who could possibly come up with a curse that will beat the other Mikaelsons so Finn will no longer have to disappear.

The official synopsis for the episode reads:

"When rumors begin to spread about the remaining white oak bullet, dangerous foes descend upon New Orleans in an attempt to take down Klaus once and for all. As the threats continue to grow, Elijah urges his siblings to lay low at the compound while Marcel (Charles Michael Davis), Vincent (Yusuf Gatewood) and Josh (guest star Steven Krueger) chase down a lead involving a mysterious vampire named Sofya (guest star Taylor Cole), who may have the answers they're looking for. Meanwhile, tensions inside the compound build as Kol is forced to come face to face with his brother Finn, the person responsible for his death. Elsewhere, Klaus and Hayley (Phoebe Tonkin) seek shelter with her former pack and stumble upon some unsettling news involving the threat against them."

The episode airs on today, April 1, on The CW.