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The National Alliance on Mental Illness offers support for those feeling suicidal at www.nami.org.

Content warning: The following contains mentions of suicide and graphic violence.

Unhealthy sibling relationships on TV (we’re looking at you, “Game of Thrones”) reach a new level in “Dead Ringers,” which tells the story of identical twin gynecologists Beverly and Elliot Mantle. Rachel Weisz takes on the roles of both siblings in her Prime Video remake, which is based on David Cronenberg’s 1988 feature of the same name. Elliot is the more outgoing, unhinged twin, while Beverly is more fearful and idealistic. “I genuinely believed — and I know it sounds like I’m half joking — but I thought two people were going to play them because they were just so different,” Weisz tells POPSUGAR of her original thoughts on playing twins.

Of course, she took on both, which adds to the show’s hall-of-mirrors quality and also makes its ending all the more disorienting. By the end of the series, the Mantle twins have reached an impasse. They’ve almost achieved their dream of launching woman-centered birthing centers across the country, but it all nearly comes crashing down when Elliot injures a patient in a moment of madness and impulsivity.

The pair’s opioid-funded investors wind up pressuring Beverly into distancing herself from her sister, revealing that — with the help of investigative journalist Silas (Ntare Guma Mbaho Mwine) — they have incriminating information about Elliot that they will release if Beverly doesn’t cut ties.

Beverly acquiesces and publicly calls her sister abusive in a speech. She has other reasons to distance herself from her twin — namely her partner, former patient Genevieve (Britne Oldford), who has been begging her to create boundaries with Elliot since their relationship began. Genevieve was originally a patient of Beverly’s, and Elliot initially seduces her while pretending to be Beverly, effectively “[getting] her for you,” as Elliot promises. Then Beverly and Genevieve start a real relationship, and Genevieve begins to ask that Beverly extricate herself from her sister’s life, enraging Elliot. Beverly and Genevieve also decide to start a family together, and Beverly — who had long been trying to conceive via IVF with her sister’s help — finally becomes pregnant.

Soon, Beverly moves in with Genevieve while Elliot spirals. But in the last half of the final episode, everything changes when Beverly goes back to Elliot of her own accord. Beverly tells her sister that she has everything she thought she wanted, but she’s still unhappy, and the pair reconcile. “I don’t think I’m capable of happiness. I’ve tried so hard and I’ve got as close as I think I could get with all this, the babies, you,” Beverly says. “There was only ever supposed to be one of us, you always were a better me,” she continues. “I have to crawl inside you now.”

As all this is going on, we also finally learn what was up with Poppy Liu’s character, Greta, the Mantles’ mysterious housekeeper. Since the beginning of the show, Greta has been collecting tampons and other objects belonging to the Mantles, and it turns out it was all for an art installation about her mother, who died during childbirth.

At the very end of the show, we see Beverly in the twins’ birthing center, a bizarre, red-tinted capsule of a building that resembles a UFO more than a hospital. Elliot gives Beverly an injection, presumably a lethal one. Then Elliot puts up her hair, adopting Beverly’s signature hairstyle (which is the one thing that differentiated the twins from each other). She then begins to cut Beverly’s babies — twins, of course — out of Beverly’s stomach. Elliot slashes open her own stomach, takes her sister’s babies, and races out into the halls crying for help. Meanwhile, Beverly bleeds out on the operating table.

In the final scene, we see Elliot — now pretending to be Beverly — happily raising her children with Genevieve. The duo are enjoying themselves in a park when a woman approaches Elliot, telling her she’d known her from a grief support group. The real Beverly had indeed been going to a grief support group to discuss her dead sister throughout the show, hinting that perhaps she’d always planned on her fate, or that some part of her didn’t want to continue living with her twin in the world.

It’s a disturbing ending, to say the least — though perhaps not as disturbing as the true story that inspired the show — and it all seems to hinge on Beverly’s apparent realization that she’ll never be content. Because of that, and perhaps because she realizes her bond with her sister is irreparably destructive, she gives her life over to her sister, allowing Elliot to take her place so the two of them can finally become one.

“Dead Ringers” is now streaming on Prime Video.

If you or someone you know is struggling with suicide ideation, the National Alliance on Mental Illness has resources available, including a helpline at 1-800-950-NAMI (6424). You can also dial 988, the nation’s suicide and crisis hotline.