This week's episode of "Supernatural" season 11 takes the Winchester brothers to the house of whacks. Titled "Thin Lizzie," the installment cracks open the mystery of Lizzie Borden, who is believed to be the person behind her father and stepmother's brutal murder back in 1892.

The victims were axed to death, with their skulls horribly splintered. Borden was never charged of the killings but up until today, many believe the crimes were her doing. Sam and Dean's next mission has Borden's old home as the setting.

But the place, however, has been transformed into a local Bed & Breakfast museum. In the "Supernatural" season 11 episode, the hunters are called to look into the series of gruesome murders that took place there. The culprit, as fans would have guessed, uses an axe to kill his or her victims.

In the promo for the installment, a hooded figure is seen stabbing a girl's back with an axe. The said victim is with her boyfriend in the museum and from the looks of it, they visited the eerie building to get spooked, only to end up dead.

While the "Supernatural" season 11 sneak peek also features an old lady made to look a bit like Borden, the killings are revealed to be the doing of Amara, who was spotted by a man named Len lurking around the museum when the murders took place.

Up to now, Sam and Dean are still in pursuit of Amara, who, as previous episodes proved, is the physical manifestation of Darkness and one that loves to feed on people's souls. It remains to be seen whether or not the brothers will catch up with the little girl this time.

The only way to find out is to tune in to "Supernatural" season 11 episode 5 "Thin Lizzie" on Nov. 4 at 9 p.m. ET on ABC.