When Dex is sick, Kayla makes him a Dino Boy and Rock Girl comic book and together they tell the animated story of what would happen if their superhero alter egos saved the dinosaurs from being wiped out but it's not easy for humans to coexist with prehistoric creatures.

In part two of the Dino Dex season finale, Dex is feeling ignored by their paleontological superstar middle sister Dana, so Saara and Kayla combine forces to bring the siblings together for an epic submarine adventure that has a few dino surprises in store.