Jurassic World Dominion packs a whole lot of nostalgia into its two-plus hour run time, most of which lies squarely on the shoulders of returning franchise stars Sam Neill, Laura Dern, and Jeff Goldblum. Though Goldblum has had brief cameo roles in the other World movies, Dern and Neill are reuniting with their prehistoric pals for the first time since 2001's Jurassic Park 3. But this trio isn't the only surprise blast from the past--though this one may be pretty easy to miss if you're not extremely up on your Jurassic Park trivia. Thankfully, we sat down with writer/director Colin Trevorrow who shed some light on the movie's most unexpected Easter egg.

There will be spoilers for Jurassic World Dominion from here on out, so please proceed with caution.

In Dominion, the dinosaurs are only a small fraction of the threat. They've managed to gain a surprisingly thorough foothold in the world in the four years that have passed since the events of Jurassic World Fallen Kingdom, and are mostly just a dangerous-but-lowkey inconvenience to human life anymore. Instead, the biggest issue facing mankind at the present moment is a swarm of mutant locusts that are ravaging crops around the globe, threatening food supplies and ecosystems. It turns out that these locusts were engineered using prehistoric DNA harvested from dinosaurs by a company called BioSyn, run by an eccentric billionaire named Dr. Lewis Dodgson.