Himmelsdalen

"Sanctuary" is a gripping 8-part psychological thriller that follows Helena, a woman who receives an invitation to visit her estranged twin sister Siri at an exclusive residential sanatorium in the Italian Alps. However, things take a dark turn when Helena realizes that Siri has disappeared and she is trapped in a place where nothing is as it seems. With the clinic's sinister intentions and her own identity called into question, Helena must fight for survival and uncover the truth behind her sister's disappearance. But as she delves deeper, she starts to question whether she can trust anyone, including herself. Will she be able to escape the clutches of the clinic and uncover the truth, or will she become another victim of their twisted experiments?

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Some TV shows that have similar genres and were produced around the same time as Himmelsdalen include 3 Body Problem, Sugar, From, Severance, The Outsider, True Detective.