On his very first mission, Nigel goes back to rescue the most famous extinct creature of all time - Tyrannosaurus rex.
- Adaptation Expansion: Holy friggin' hell yes!
- Certain scenes from the original are featured in greater detail - Nigel's examination of the T. rex nest, for example, includes a brief appearance of the Troodontid Pectinodon, as well as Troodon itself, which are searching the nest for either eggs or small mammals to eat.
- Nigel's escape from the Tyrannosaurus pack is extended to include a brief encounter with a group of Thescelosaurus and Acheroraptor - both of which are easily caught by Nigel and his camera crew.
- A completely original scene has Nigel arriving at a prehistoric beach as a group of Cretaceous sea turtles (Toxochelys, to be exact) arrive to spawn, with Nigel sending them back to the present. A brief return to the beach sees the rescue of several beached sea reptiles.
- Lastly, there's well over a dozen Canon Foreigners that get rescued in this episode.
- Canon Foreigner: In the original show, Nigel encounters a total of three prehistoric creatures while in Late Cretaceous Montana - Tyrannosaurus rex, Triceratops, Ornithomimus, and an unidentified pterosaur that reuses the model of Nyctosaurus (
this was before it was confirmed that nyctosaurs survived this late into the end of the Mesozoic). Here, he encounters and rescues members of quite literally every species known to inhabit the Hell Creek Formation, as well as some speculative ones, and even a lost pair of Alamosaurus. - Feathered Fiend: A set downplayed examples consisting of Acheroraptor, Dakotaraptor, and even Tyrannosaurus itself.
- Giant Flyer: Quetzalcoatlus fills this role, being a pterosaur the size of a giraffe.
- Graceful in Their Element: Defied by the Quetzalcoatlus - while they are certainly capable fliers, they are also very agile on land.
- Know When to Fold 'Em: A flock of Quetzalcoatlus get into a fight with a pair of Dakotaraptor over eating Nigel, but all of them immediately bail out once a female Tyrannosaurus shows up. Said rex's appearance is also enough to send a pair of Alamosaurus packing, even though the sauropods are too big to be prey for the giant sauropods.
- Never Smile at a Crocodile: Multiple prehistoric crocodilians show up in this story. However, they're nowhere near the most dangerous predators in this era.
- Sea Monster: A group of Mosasaurus are briefly encountered, having ended up beached. Nigel rescues them without hesitation.
- Shout-Out: Montanaspinus is a reference to the Saurian meme about said fictitious spinosaur, included because the author found the joke amusing.
- Spared by the Adaptation: The adult female Tyrannosaurus makes it back to the present in this story. She is named Sue after the best known Tyrannosaurus fossil at the time of writing.
