Fan Casting Sarah Caldwell in DAY ONE

(Mother, mid-30s) Starting Point: Compassionate, empathetic, overworked. Often resents Mark’s emotional distance. Fiercely protective of Emily, but still believes in helping others. Arc Across 24 Hours: Morning (Hours 1–4): Struggles with Mark’s coldness (wants to help bitten neighbor). Clings to morality when others lose it. Afternoon (Hours 5–12): Begins to fracture — helping strangers leads to near-death encounters. Torn between her values and Mark’s survival-first mentality. Night (Hours 13–20): Quietly breaks down in abandoned building, questioning if she’s strong enough. Emily comforts her — reversing their mother/daughter dynamic. Dawn (Hours 21–24): Finds resolve. Not naive anymore, but not broken. Becomes the family’s emotional center, holding them together. End State: More hardened but refuses to lose empathy. Her compassion balances Mark’s pragmatism.