Nani's middle school friends, Ellen and Lona, return to Kauai for a visit and, thinking that Nani is vice president of the business she works for (which is clearly not true), invite her and her ʻohana on a yacht cruise. Meanwhile, Stitch encounters an experiment that reverts individuals to a primitive state. Lilo, Jumba, Pleakley, Ellen, and Lona are transformed into cave people, which causes trouble on the yacht. Now, Stitch must find and capture Retro before it's too late.
- In "Woops", Retro erroneously appeared with Gantu's other captive experiments, but he was captured by Lilo and Stitch.
- Moral: Be yourself. Everyone wants to be liked for who they really are.
- Nani's junior high friends, Ellen and Lona, are revealed to live in New York City and Los Angeles, respectively.
- Lilo as a cave girl looks similar to a plump version of Fang from Dave the Barbarian.
- This is the only episode where Nani is at fault, as opposed to Lilo and/or Stitch.
- Technically speaking, Nani did not lie about being rich, though Ellen and Lona jumped to false conclusions before she could explain.
- The saber-toothed squirrel that Retro created from an ordinary squirrel is reminiscent of Scrat from the Ice Age franchise. Coincidentally, Disney currently owns the Ice Age franchise following the studio's acquisition of 20th Century Fox in 2019.
- Retro also devolved an elephant and a tiger into a wooly mammoth and a saber-toothed tiger respectively, both of which also starred as one of the main characters in the Ice Age franchise.
- In 2002, Argentinean scientists uncovered the remains of a similar extinct prehistoric squirrel-like mammal with long fangs like the one seen in this episode and in the Ice Age franchise which was dubbed Cronopio dentiacutus in 2011. 
- The wildlife preserve is a parody of the one from the 1993 sci-fi film, Jurassic Park.
- Evidently, some scenes in Jurassic Park were filmed in Kauai (for example, the scene with the Gallimimus stampede).
- At the end of this episode, Lilo even mentions that the wildlife park reminds her of a movie she once saw, which is referenced by a living T-Rex that Retro reincarnated by unknown means and the rippling puddle before it appears, a nod to said film.