Played by: himselfNigel Marven returns to play as himself, this time as an owner of a prehistoric wildlife park. He travels to the past in order to bring extinct prehistoric creatures back to life.
- Badass Bookworm: Knows all about the prehistoric creatures he's about to face and constantly tries to capture them. Most of the time, he succeeds.
- Expy: Think of him as a time-traveling Steve Irwin.
Played by: Rod ArthurThe Head Keeper of the park. In charge of cleaning, feeding, and taking care of the resident animals. Consequently, he often suffers the shenanigans that happened in the park.
- Butt Monkey: Usually on the receiving end of the whatever bad things that the prehistoric creatures brought, mostly from the Titanosaurs.
- Cool Old Guy
- Only Sane Man: The one who usually complains to Nigel whenever he's planning to bring back the dangerous creatures back to the park or points out potential issues. He's still fond of them all, even the Titanosaurs, but he will still point out issues.
Played by: Suzanne McNabbThe head-vet of the park. Tasked with treating the injured animals and looking after their health.
- Hospital Hottie
- Team Mom: Especially in one episode where she had to nurse the baby Smilodon because his mother's milk has ran out.
Terence and MatildaThe Tyrannosaurus that Nigel brought back to the park.
- A Day in the Limelight: Terence gets a whole subplot to himself in Episode 5, revolving around him being seriously injured after a fight with his sister. Sadly, this is not true for the rest of the series.
- Butt Monkey: Terence is the second biggest Butt Monkey in the series (the other being Bob).
- Demoted to Extra: Terence, as the series went on. Watch all the episodes (except for Episode 5) and you'll see that it is Matilda who plays the bigger role.
- Fluffy the Terrible: They're both Tyrannosaurus rex, one of the most revered (and feared) dinosaurs in history. Nigel decides to give them the names... Terence and Matilda.
- Sibling Rivalry: Constantly fight to the point that the park staff had to separate them. Culminates in Episode 5, in which Matilda seriously injures Terence in a fight.
- Tyrannosaurus rex
TheoThe Triceratops who Nigel rescued from a Tyrannosaurus attack. Started out a baby, he grew rather quickly.
- Demoted to Extra: Other than his introduction episode he's had only minor cameo's.
- Pint-Sized Powerhouse: Theo starts out as one of the smaller dinosaurs do to his young age. But he begins to grow rather quickly after his debut.
MarthaThe mammoth Nigel saved from death and managed to lure back to the park.
- A Day in the Limelight: Aside from her debut, Episode 6 had her briefly go toe-to-toe with Matilda.
- Gentle Giant: She's about as sensitive and sweet-natured as a giant hairy elephant-like creature can get.
- Mama Bear: She once rushed to defend a baby elephant from Matilda.
The TitanosaursThe park's resident sauropods, and a major source of headaches for Bob.
- Gentle Giant: Despite their size, they're not really that dangerous. Unless they are spooked.
- The Millstone: Due to simply not-giving-a-damn about anyone other than themselves, they frequently cause trouble for the park.
- Their first breakout prevents Bob from hearing what size cage Nigel needs for the terror birds.
- They also demolish part of the Bug House, setting Bob back a bit on his schedule.
- Averted in regards to the breakout, though: that was more the Troodon's fault. Instead, they fill the role of The Millstone by knocking over the trees Bob is planting as future food for them.
- No Name Given: Their species is never stated in series. Fanon is that they are either Borealosaurus or Daxiatitan.
- An alternative, given recent discoveries, is that they could be Dongbeititan.
- Seldom-Seen Species: While sauropods are a staple of dinosaur fiction, titanosaurs are rare in media, as they are usually ignored in favor of diplodocoids or brachiosaurs.
The TroodonA stowaway from the final mission. He causes the mass breakout.
- Feathered Fiend: Only has a thin coat, though.
- Hungry Menance: How did it get into the park? It snuck on the jeep to eat the leftover Deinosuchus bait and was still in it when Nigel returned to the present.
- Seldom-Seen Species: Troodon is usally ignored in media in favor of other, more well known raptors.
- Unwitting Instigator of Doom: It's the reason the mass breakout in the final episode happens: after stowing away on Nigel's jeep (it was eating the leftover bait meat), it attacks Bob, almost causing him to collide with a titanosaur. The spooked sauropod promptly runs off, smashing open every exhibit it comes by.