[s4e5] I Hear You Knocking -

: Though the intended sacrifice failed, the Hollow accepts Marcel’s blood and grants his allies a magical thorn capable of killing an Original.

: A link is revealed between the Hollow's dark magic and Hayley's former wolf pack, suggesting that the ancient evil has been targeting her bloodline for generations. Emerging Dynamics: Freya and Keelin [S4E5] I Hear You Knocking

Watch the official inside look for this episode to see the producers discuss the Hollow's psychological grip on Klaus and Marcel: : Though the intended sacrifice failed, the Hollow

: Reviewers from Telltale TV highlight this episode for its LGBTQ+ representation, as Keelin chooses to stay and help Freya despite being given the chance to flee. The Hollow anchors itself to the living world

The Hollow anchors itself to the living world by exploiting the darkest fears and past traumas of powerful supernatural beings.

: 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 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.