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

Unhealthy sibling relationships on TV 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.