In a Changed Timeline, You Don’t Remember Your Changed Life: Notably, not even Harriet has more than vague feelings about the timeline where Max died. Instead, after she refused to follow Max at the concert, she just proceeded with her Maxless life—with seemingly no memory of her life with Max.
Multiple Naive Timelines: Harriet can change her behavior in the past to create new timelines. No mention of branching or other time model factors.
Time Travel Methods
Vivid Envisioning: Harriet needs only hear a song from a moment in her life to transport her back.
