...ister" episode

https://www.thewrap.com/cristin-milioti-black-mirror-uss-callister-star-trek-meets-metoo/

The actress says after landing her role, she intentionally stayed away from Star Trek. “I wanted to use whatever confusion I might have, because that’s what she might be experiencing as well," she says. "So I watched about two minutes of one episode and was like, ‘I don’t want to watch any more of this.'”