Prehistoric Park is a six-part nature docu-fiction television series that premiered on ITV on 22 July 2006 and on Animal Planet on 29 October 2006.

The fictional component is the theme that Nigel goes back to various geological time periods through a space-time portal, and brings live specimens of extinct animals back to the present day, where they are exhibited in a wildlife park named Prehistoric Park, which is a big area between high steep mountains and ocean, with varied environments, in what looks like KwaZulu-Natal province in South Africa.

The story, which is told in the style of a documentary, focuses on naturalist Nigel Marven leading missions to find and collect extinct animals from the distant past by use of a time machine.

Nigel heads back through the time portal and finds Tyrannosaurus tracks in volcanic ash, and thinks by the dragged toes that it is the female with the gored thigh.

Nigel and others build a crude stockade wall alongside the river out of local fallen timber, trying to funnel her through the time portal.

Nigel plans to bring the mother and her babies back to the park with him, but a male Tyrannosaurus attacks the female for her kill.

In the ensuing battle, the male Tyrannosaurus smashes the female's head against a rock formation, an injury that results in the mother's death, after her last roar to Nigel to save her children.

It leaves Nigel with three minutes while the blast front travels from Chicxulub to Montana at 200 times the speed of sound (c 245,000 km/h) and reaches him.

Nigel goes up a rocky slope to scout the area, seeing what looks like a gap in the trees, and hopes that Mammoths may be present there.

In the park, Suzanne gives sedative and antibiotic to the Mammoth, treats the wound, and after some pulling, extracts a stone spearhead from it.

Twelve Microraptors come: they were after insects disturbed by the titanosaurs pushing through vegetation and tearing up the ground and treading on insect-ridden rotten logs.

Nigel makes an enclosure of net, with inside it a hollow baited with insects, as Microraptors can only glide and cannot take off from flat ground.

On site, Nigel and his party finds the titanosaurs laying eggs in ground warmed by underground volcanic heat, a good place for incubation.

Nigel and his team put their gas masks on and quickly set up the time portal in the falling volcanic ash.

On site Nigel sees a female Smilodon stalking a Toxodon and then after a short chase, she jump on its head and kills it with a bite to the throat.

A Phorusrhacos starts to eat from the carcass but another Smilodon appears and chases it away, forcing it to drop a lump of meat which it had pulled off.

Nigel tows the piece of meat behind his jeep and entices the terror bird to chase it through the time portal into the park.

She pulls it apart with a knife and fork and finds that it is full of hair and bone and bits of animal hide, as if hunger had forced the Smilodon to scavenge.

In the morning he plays it back and finds that a male Smilodon had investigated it and knocked it over, urinated on it and left a musky mammal smell.

The injured Terrence is in good hands, so Nigel, with assistants, drives in the jeep through the time portal to the Carboniferous, where the land is covered with coal forest.

In the park, an enclosed building to contain a 35% nitrox atmosphere for the coal forest wildlife is being built, with airlock doors.

In the park, Suzanne has put climbing poles in the Smilodon enclosures: as environmental enrichment, to make them happier so the female will be more accepting of the male.

In an observation enclosure, Terrence is lethargic, and blood tests show Suzanne that Terence has septicaemia, and she reluctantly gives him antibotic.

In the park, Bob has filled the insect house with 35% nitrox atmosphere and has realized the resulting increased fire risk.

Nigel plans to add a Deinosuchus, an ancient species of giant crocodilian which measures 50 feet long and weighs up to 9 tons, to the park.

Nigel revs his jeep's diesel engine: that makes the Albertosaurus back off, but not for long and they get accustomed to the noise and they chase him, but eventually tire and give up.

When he reaches the jeep, he sees that three Troodon are eating the meat that he had brought as bait chasing them away using a portable aerosol-like horn.

In the park, Bob drives the jeep to his next job, and mutters that Prehistoric Park needs more keepers, as they have so many problems: the terror bird escaped its enclosure again; the Smilodon cubs have had Suzanne up half the night, the titanosaurs eat too much, and to make matters worse, their digestive systems cannot handle the modern vegetation resulting in bad diarrhea, and Nigel constantly bringing back more creatures is not helping.

The Deinosuchus, accustomed to fighting giant theropods, surges out of the lake at Matilda, who swings around just in time to dodge the attack.

At the end of the episode we see Nigel at his headquarters planning his next mission before travelling through the time portal, suggesting future expeditions into prehistory.