Blood Relations

Thomas is a wealthy, impulsive son who resents his father and mother’s death; he orchestrates pranks that mask deeper schemes and allies himself with his girlfriend Marie. His fixation on family wealth and past losses fuels dangerous plans and a willingness to manipulate others within the mansion. He is revealed to be collaborating with his father in a plot to transplant Sheila's brain into Marie, demonstrating a chilling blend of ambition and cruelty.

Marie becomes entangled in the family's deadly web of schemes around the estate and its fortune. She experiences manipulation, fear, and the threat of harm as she uncovers the estate’s intrigues and the various plots targeting her and her companions. Ultimately, she is drawn into the plan that culminates in the brain transplant twist, making her a focal point of the conspiracy.

Andreas is a controlling neurosurgeon patriarch who wields influence over both family and medicine. His pride and surgical mastery drive much of the conflict, including brutal acts in the basement that reveal his moral ambiguity. He collaborates with Thomas to pursue the extreme brain transplant scheme.

Jack is the ambitious lawyer brother who seeks power and status. He becomes entangled in the inheritance plots and is willing to betray others to secure wealth. He attempts to manipulate Marie and is later confronted by the consequences of the family’s deadly plans.

Sharon is Jack’s girlfriend who becomes entangled in the family’s moral quagmire. Her affair with Andreas intensifies the house’s dangerous dynamics and she becomes a casualty within the escalating violence.

Sheila is the deceased mother whose memory haunts the mansion and whose potential brain transplant is the target of the final scheme. Her influence lingers in the family’s ambitions, shaping the plot’s emotional and moral stakes.

Yuri is the handyman who becomes a pivotal, opportunistic presence. He pretends to assist authorities while coordinating with others to trap Marie and influence the estate’s fate.

A hospital physician who represents the medical world beyond the mansion’s walls, involved in the ongoing operations and care surrounding the family’s crisis.

A junior doctor assisting in hospital procedures, providing a clinical backdrop to the unfolding tragedy and the contrast between surgical precision and moral failing.

A heart surgeon involved in medical procedures surrounding the family’s crisis, underscoring the centrality of the operating room to the story’s tension and horror.

Carrie Leigh is Thomas's girlfriend listed in the cast; within the story’s shadowy dynamics she exists in the environment of manipulation and social entanglement around the estate.