[s4e5] 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.

: Though the intended sacrifice failed, the Hollow accepts Marcel’s blood and grants his allies a magical thorn capable of killing an Original. [S4E5] I Hear You Knocking

The episode also marks a significant shift in the relationship between Freya Mikaelson and her captive-turned-ally, Keelin. : Marcel is haunted by visions of Elijah

: 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 : The two are drawn to an abandoned

: 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

" 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