Once Carrie Finch (Sophia Lillis) shows up at the Irvine’s house with a loaded gun, the “All Her Fault” finale takes a violent turn that results in multiple deaths.
Just seconds after her arrival, Carrie unintentionally shoots Colin (Jay Ellis) when he reaches for her gun, and things only escalate from there. Carrie attempts to have as much of a heart-to-heart with Marissa (Sarah Snook) as she can with a gun, revealing the true antagonist in the situation as Peter (Jake Lacy), who swapped his and Marissa’s dead baby with Carrie’s living one after the car crash.
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