Not much is known about these mutated lizard monsters, but Fallout Season 2 finally revealed a key part of their backstories — and it goes back even further than fans first thought. Spoilers ahead for Fallout Season 2 Episode 5. Amazon Prime VideoSo why include this information if this isn’t relevant to the games? Fallout Season 2 is all about how the systems we thought we could trust were actually full of evil intent, and that includes the most fearsome creatures in the wasteland. Fallout Season 2 is now streaming on Amazon Prime Video.