SPOILER ALERT: This story contains spoilers for Season 2, Episode 7 of “Gen V,” now streaming on Amazon’s Prime Video.

It turns out Marie (Jaz Sinclair) had a very good reason for originally thinking Dean Cipher (Hamish Linklater) had no powers: He doesn’t.

Toward the end of this week’s episode of “Gen V,” Marie, her sister Annabeth (Keeya King), Cate (Maddie Phillips) and Emma (Lizze Broadway) look on in horror as they discover the elderly burn victim man they correctly assumed was Thomas Godolkin (Ethan Slater) has been controlling Cipher this whole time. It wasn’t Cipher who had the power to control others, it was Thomas Godolkin. And from his hyperbaric chamber, Godolkin was controlling the man known as Cipher (who has no powers at all), and jumping in and out of others’ bodies as well, while he remained on life support.

Until, that is, Marie brought the century-old supe back to fighting form on this week’s “Gen V,” in the hopes thatThomas Godolkin would help them stop Cipher. But too bad, he is Cipher! Now, Marie and Annabeth have Godolkin’s pending massacre plans to deal with, on top of trying to mend their fragile sibling relationship: Annabeth confesses she knew Marie was going to kill their parents by accident before it happened, and it’s haunted her ever since.

Jaz Sinclair as Marie Moreau and Keeya King as Annabeth Moreau in “Gen V”

Jasper Savage/Prime

“She’s been completely removed from the supes, living with her Aunt Pam, and she thinks that supes are monsters. She doesn’t fully grasp her powers, nor does she really understand them,” King told Variety abiut playing Marie’s precog sister.

And in her confusion over what happened to them and their parents, Annabeth’s pain and shame after their deaths turned into resentment toward Marie — she chose to blame her sister for something Annabeth knew was not Marie’s fault.

The twist in the sisters’ story raises the stakes for not only Marie and Annabeth, but also for Cate, Emma, Jordan (Derek Luh/London Thor), Sam (Asa Germann) and Polarity (Sean Patrick Thomas) going into the “Gen V” Season 2 finale next week. It shifts the perspective from what the audience saw in the opening scene of Season 1 — the deaths of Marie and Annabeth’s parents — and revealed that Marie is not solely responsible for her parents’ deaths. Annabeth could have said something and stopped it.

Hamish Linklater as Dean Cipher in “Gen V”

Jasper Savage/Prime

“I’ve watched the show, and I’m like, ‘OK, Annabeth thinks that Marie killed her parents,’” King said. “And then when I sat down with our showrunner, Michelle, she actually explained to me the path that the writers had for Annabeth, which is that she actually had these visions and she’s been holding onto them for a very long time.

“As an actor, it’s sort of weaving in little moments of pain and regret of not acting on those visions, and then also sort of blaming my sister as well,” she continued. “Because when you’re upset with yourself, sometimes it’s like, ‘Where do I place that hurt?’ So sometimes she does place it on Marie, her sister.”