[s4e5] I Hear You Knocking Page

: The two are drawn to an abandoned house where they are intended to kill each other, providing a massive sacrifice of power for the Hollow. Ultimately, Klaus spares Marcel, knocking him unconscious instead—a major moment signaling his ongoing redemption arc. Ancestral Secrets & The Werewolf Link

: Freya risks her life to create a cure for the infection the Hollow placed on Klaus, solidifying her bond with Keelin as they work together to protect the family. Key Revelations [S4E5] I Hear You Knocking

" I Hear You Knocking " is the fifth episode of the fourth season of the CW series , which originally aired on April 14, 2017. This pivotal hour serves as a psychological deep dive into the show's two most complex power players, Klaus Mikaelson and Marcel Gerard, as they are forced onto a violent collision course by a malevolent entity known as The Hollow . Psychological Warfare: The Hollow’s Manipulation : The two are drawn to an abandoned

Watch the official inside look for this episode to see the producers discuss the Hollow's psychological grip on Klaus and Marcel: Key Revelations " I Hear You Knocking "

: Marcel is haunted by visions of Elijah and Klaus, who goad him to finally seize his revenge against the Mikaelson family for their centuries of betrayal.

: The Hollow manifests as his abusive father, Mikael. These hallucinations taunt Klaus, suggesting he is weak and that the only way to protect his daughter, Hope, is to revert to his most brutal, murderous self by killing Marcel.