The Fall of the House of Usher: Why does Roderick talk to a brick wall?

In the episode "The Tell-Tale Heart" of The Fall of the House of Usher, Roderick Usher is shown talking to a brick wall. At first, one might assume that this is due to Roderick's advancing dementia. However, there is more to this wall than meets the eye. The reference to Edgar Allan Poe's "The Cask of Amontillado" provides a clue - the wall Roderick is talking to may contain someone buried within it. The prevailing theory is that Griswold, who has been sexually harassing Madeline and potentially fathered a psychopathic daughter with Verna, is the one buried behind the wall. Roderick has a lot to share with his walled-in friend, including his struggles with vascular dementia and his confusion about the mysterious woman who keeps appearing in his children's lives. Tamerlane believes her husband is cheating on her with one of Verna's disguises, while Victorine is tormented by Pamela, another version of Verna who claims to have an irregular heart.Meanwhile, the Usher children are dealing with their own issues. Frederick is fixated on bringing his wife home, not out of concern for her well-being, but to exact revenge on her for betraying his trust. The remaining Usher siblings, including Victorine, Frederick, and Tamerlane, try to come together to mourn their fallen siblings and protect themselves from the threats targeting the Ushers. However, due to their personal grievances and distrust, they struggle to unite and form a cohesive front.Dupin confesses to Roderick that he made up the informant in order to create division among the Ushers, not realizing it would result in anyone's death. Perry's death, as well as the deaths of Camille, Leo, and Victorine, were not part of Dupin's plan. In this episode, it is revealed that Victorine has booked her girlfriend, Alessandra, for a surgery to implant Verna with an experimental heart mesh. However, their relationship becomes strained when Alessandra learns of Victorine's unethical actions, and she threatens to disclose the truth to the press. The situation escalates, and Victorine throws a statuette at the door as Alessandra leaves, but the screen cuts to black, leaving her fate unknown.As Victorine tries to reach out to Alessandra, she begins hearing a mysterious mechanical chirping sound that only she can hear. This haunting sound follows her wherever she goes, causing further distress. Roderick visits Victorine and reveals that he, too, can hear the mechanical chirping. Together, they investigate the sound and eventually stumble upon a shocking revelation - Victorine had indeed hit Alessandra with the statuette, causing her death. Overwhelmed by guilt, Victorine decides to open Alessandra's chest and implant the heart mesh, attempting to revive her lover. However, the sound she had been hearing was the machine trying to pump blood through a lifeless heart. Devastated by her actions and the horror of her discovery, Victorine stabs herself in the heart in front of her father, mirroring Roderick contemplating suicide earlier in the series.In conclusion, the reason why Roderick talks to a brick wall is closely tied to the burial of Griswold and a deeper mystery surrounding the Usher family. Roderick's conversations with the wall provide an outlet for his struggles with dementia and the secrets he holds. However, the discovery of Victorine's dark actions and her disturbing demise overshadow any answers Roderick seeks, plunging the Usher family further into darkness and despair.