How does the movie end for the Platt family?

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Ending Summary

1. Greg dies in the prehistoric world when an Allosaurus bites off his leg and devours him while trying to protect his family. Denise, Audrey, Brian, and neighbor Jeannette survive long enough to find a wormhole that offers a chance to return.

2. The survivors—including Denise and the kids, plus Jeannette—leap through the wormhole and emerge back in 1982, about twenty minutes before the original cosmic event transports Oak Street to prehistory.

3. Using that short window, Denise makes strategic moves:

   • She orders a pizza from a payphone so Greg, who delivers pizzas secretly, is away from Oak Street when the disaster hits. - She calls neighbors—such as the librarian—and Jeannette returns home to warn her parents—saving several people from the catastrophe.

4. Two years later, Oak Street/I Flowervale is mostly back to some normalcy. The dinosaurs have been dealt with. Denise has published a bestselling book titled The End of Oak Street recounting her family's ordeal.

5. In the final scene, Denise, Greg, their children, Jeannette, and several neighbors gather at a barbecue. All are alive and together—including Greg, who was saved due to Denise’s actions—and Jeannette is present. However, there are two versions of Jeannette (one from before the timeline change, one who survived the past)—and possibly two versions of some others. The timeline rewrite has created branching outcomes.

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Key Themes & Takeaways

• Denise’s decision to make it happen early (ordering the pizza, warning people) preserves lives, showing a theme of agency over fate. - The ending isn’t a clean reset; there's moral complexity—some version of Oak Street still got lost, some people still died, and one version of Greg died. The happy resolution comes with cost. - The dual Jeannette (and implied duplicates of others) raises questions about identity, sacrifice, and which “version” of reality counts as real.

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In short: the Platt family survives. Greg—apparently dead in one version—is saved via time travel. Denise’s quick thinking rewrites the disaster. But the victory is bittersweet, shadowed by what was lost and the paradoxes that remain.