Jack is the main antagonist of Host. He is played by James Swanton.
Biography[]
Jack is some kind of spirit or demon, mistakenley summoned by Jemma after she played a joke during the seance, pretending to have made contact with a friend who commited suicide.
After Seylan drops out of the call and Jemma reveals that her story was all a joke, Jack goes poltergiest mode, breaking Emma's glass, pulling Haley's chair backwards, and appearing in visions to her and Caroline. Haley manages to get back in touch with Seylan and informs her of everything that has happened. Seylan believes that Jemma's prank could have summoned a demonic spirit, which has taken on the guise of 'Jack', and begins to give them instructions on how to close the séance. The spirit interrupts this by causing more phenomena and Seylan's call drops out once more.
The group try closing the seacne themselves, and everything seemingly goes back to normal. Believing the ordeal is over, Radina gets up and leaves the room unaware of Alan's body hanging behind her. Caroline's artificial background is interrupted as her face is smashed into the camera, causing her laptop to fall. Emma's camera shows one of her filters on an invisible figure in the living room, the face turns to look at Emma, scaring her. Emma then scatters flour on the floor, showing the footprints of the spirit coming towards, causing her to hide in her room. Radina attempts to flee her home after Alan's body drops in front of her, but is pulled away from the door and killed by the spirit. Caroline is then seen repeatedly smashing her face onto the desk, pleading for help. Haley and Jemma argue, passing the blame between each other, only for Haley to be pulled off-screen. Frightened, Jemma immediately leaves her home to check on Haley in person. Teddy then returns to the call, only for the spirit to attack him (now in the form of a rotting zombified corpse-like demon) and kill Jinny, by breaking her neck. Teddy is then knocked unconscious and burned alive. Emma, now the only person still active in the call, pans her camera to the doorway of her room. She throws a blanket, which lands on the spirit, showing its form. Terrified, Emma opens her window to escape, falling to her death. Caroline’s father’s whereabouts are still unknown at this point.
Jemma makes it to Haley's home but is attacked by the spirit while other supernatural phenomena occur around her. She manages to find Haley hiding under her desk, and the pair attempt to escape the house using the flash of Haley's Polaroid camera to light the way, only for Jack to attack the two of them as the Zoom call timer expires.