'The Originals' Spoilers: Sebastian Roché Returns as Mikael Mikaelson to Haunt Klaus and Hurt Pregnant Hayley in Episode 20 Titled 'A Closer Walk with Thee' [WATCH VIDEO]

There is something wrong on the "Other Side" in "The Vampire Diaries" and the CW spinoff series "The Originals" appears to be affected. Someone from beyond the grave will be haunting Original hybrid Klaus (Joseph Morgan) and it is none other than his vampire hunter father, Mikael Mikaelson (Sebastian Roché).

A promo video for the upcoming Episode 20 titled "A Closer Walk with Thee" has been released to tease about Klaus' nightmares about Mikael returning to New Orleans. "Greetings boy," Mikael stated after grabbing Klaus neck.

The next scene showed Klaus waking up and revealed his dilemma of Mikael literally mocking him from beyond the grave. "The spirit world is crumbling," Klaus noted.

However, it appears Klaus is not the only target of Mikael in the next episode because the other scenes showed pregnant werewolf Hayley (Phoebe Tonkin) declaring that she is having nightmares as well. The promo video further showed Mikael haunting and attacking Hayley who lies on the ground unconscious while covered in blood.

Elijah (Daniel Gillies) looks worried after revealing that Hayley is not breathing while Klaus expressed concern over his unborn hybrid child. In Hayley's nightmares, the pregnant werewolf can be heard screaming indicating that her life and the life of her baby are in danger. "Welcome to my hell," Mikael told Hayley before the promo video ended.

The official synopsis for Episode 20 in the Carter Matt report reads: "Hayley (Phoebe Tonkin) confronts a surprising enemy as she and her unborn baby fall into peril during a celebratory wake to honor a fallen member of the community. In order to save Hayley, Klaus (Joseph Morgan) and Elijah (Daniel Gillies) enlist the help of Genevieve (guest star Elyse Levesque) who struggles to maintain control over Davina (Danielle Campbell) and the other young witches. Cami (Leah Pipes) tells Marcel (Charles Michael Davis) that Francesca (guest star Peta Sargent) is determined to find a mysterious key that may unlock a family secret. Meanwhile, as Klaus suffers from nightmares of his father Mikael (guest star Sebastian Roche), he is forced to examine his troubled relationship with his own adoptive son, Marcel."

"The Originals" returns with Episode 20 "A Closer Walk with Thee" on Tuesday, April 29 at 8 pm ET on the CW Network.

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