You can watch the TV series "Fallout" (2024) on Amazon Prime Video. It is available for streaming there with a subscription, and you can also access it with ads on Amazon Prime Video Free with Ads. The series is based on the popular video game series and is set in a post-apocalyptic world.

If you are looking for the movie "The Fallout" (2022), it is available on HBO Max, but availability depends on your country. Subscription plans start at €5.99/month or $9.99/month with various streaming quality options.

So it depends on whether you want to watch the "Fallout" TV series or the movie "The Fallout."