: Tasked with finding a cure for Klaus's "infection," Freya must decide how far she is willing to go, eventually developing a weapon with Keelin that could actually kill Marcel. Critical Reception & Key Moments

: Both Klaus and Marcel are plagued by hallucinations—Klaus sees his father, Mikael, while Marcel is tormented by visions of the Mikaelsons—driving them toward mutual destruction.

: The episode ends with the introduction of a mysterious plant (vines that can kill Originals), which shifted the power balance for the remainder of the season.

The following review is based on The Originals Season 4, Episode 5, titled originally aired on April 14, 2017. Episode Overview: A Haunted Alliance

The Originals Season 4 Episode 5 Review: I Hear You Knocking

: Hayley and Elijah travel to see Mary, uncovering a dark link between The Hollow's magic and Hayley’s own werewolf lineage.

In this hour, the overarching villain of the season, , takes center stage by mentally invading the minds of Klaus and Marcel. The episode serves as a tense, psychological thriller that traps these two powerful enemies in a shared haunting, forcing them into a collision course designed to end in a lethal sacrifice.

: The revelation that Mary’s husband, under the Hollow's influence, killed Hayley’s parents added a tragic and personal layer to the conflict. Audience Perspectives