[s3e22] The Day We Died -

: Her death at the hands of Walternate serves as the emotional catalyst for Peter and Walter to "cheat the rules of time".

Reviewers at the time noted the episode's "epic scope" and its bold choice to unsettle viewers through drastic character deaths and cosmetic changes, like Broyles' damaged eye or Astrid’s new hair. [S3E22] The Day We Died

“I felt they handled it pretty elegantly - Peter was meant to die as a boy, and the best bad option for fixing the universes was the one he chose at the end of the episode.” Reddit · r/fringe · 1 year ago 'Fringe' season finale recap/review: 'The Day We Died' : Her death at the hands of Walternate