Drew was suddenly awakened by the sound of a bump, followed by the sound of people running around. Running out onto deck, turned to Jack, "What happened?" Jack's voice was frantic, "We must have hit something; maybe a floating rock…" Drew sprinted over to the starboard camera, to see what was showing on the camera. He finished Jack's sentence, "Or a carcass."

Using a net, the carcass was hauled out onto deck and Drew, Jack and Leon were looking at it. The carcass was of a large turtle; by their reckoning, it was some ten feet long and twelve feet wide. It looked like a gigantic leatherback turtle, however, it was a sandy green-brown, as opposed to the black colouration of the modern turtle. Immediately, it was clear it had died a violent death; one of the rear paddles had been ripped off and there were bite marks on the shell. Drew knew what it was immediately, "Archelon; one of the largest turtles of all time. This one probably isn't even fully grown." Jack said, "Looks like it met a foul end; one of the flippers is missing and there's damage to the shell. What could have done that?" Drew shrugged, "Probably a Tylosaurus." Leon said, "The injuries indicate the Archelon was ambushed from underneath, seriously wounded and then turned loose to die. Many predators do that, like sharks. I'm guessing mosasaurs did the same thing too." Jack turned to Drew and, "I'm guessing, fearless leader, that indicates we're on the right track." Drew nodded, "Bingo. We keep heading out. It's a good sign; we're in Tylosaurus territory."

After a few hours, the team stopped the Mariner and looked around the vast expanse of ocean. Drew, Jack and Adrian stood out on the deck and Jack sighed, "It's gonna take us some time to find a Tylosaurus out there, even with the radar and the ROV." Adrian turned to him, smiling, "Which is why we call in special help…"

Drew, Jack and Adrian walked up to Keehar and the Pteranodon, who were sunning themselves on the deck. The Pteranodon, who the team had named Mert, and Keehar had gotten on rather well, spending a lot of time together and sometimes even sleeping against each other. The association was beneficial on Keehar's part; the larger Pteranodon could scare anything that came near off. Walking up to the two pterosaurs, Adrian whistled and Keehar hopped over to him. Adrian lifted a camera and moved towards the Rhamphorynchus.

Ever since the Microrator mission, in which Keehar had been instrumental in helping them escape a volcanic eruption, Adrian had been training Keehar to come when either whistled to or given a vocal command. The aim was that Keehar, with his superior vision, could serve as an "eye in the sky" for the mission team. Part of this procedure involved placing a camera on Keehar's head. Keehar went along with the procedure stoically, even though he didn't like it. Eventually, Adrian clipped the camera onto Keehar's head, flicked his arm out to sea and said "Go high." Keehar chittered in reply and vaulted off the boat, flying about sixty feet in the air (out of the reach of any of the local predators). Keehar scanned the area for about an hour, before returning to the boat. Adrian unclipped the camera from the Rhamphorynchus' head, tickled him under the chin, and gave him a fish.

A short while later, the whole team were surrounding the footage from Keehar's head cam. Most of the footage was unpromising, until a point where Keehar picked up several large animals moving through the water; it was too high to tell what animals they were, but it was a start. Drew turned to Adrian, "Head to those co-ordinates; we'll stand a good chance of finding whatever those animals were."

The Ancient Mariner turned into the surf and headed towards the co-ordinates. Drew stood on the deck and looked out to sea; it was amazing as to how truly little the ocean changed over the eons. The vista of 75 million years ago was near-identical to the one today; only instead of whales, seals and gannets, there were mosasaurs, plesiosaurs and Pteranodon. The same roles, just different actors. Suddenly, Leon's voice called out from the bridge, "Drew! We've found something on the starboard cam." Running in, Drew saw the rest of the team standing by the starboard camera, smilling. Drew turned to Jack and asked, "Have we found some Tylosaurus?" Jack smiled, "Not exactly", and they parted, allowing Drew to look at the starboard camera. What he saw amazed him; several large animals were swimming right by the boat.

It looked like a gigantic version of the Cryptoclidus back at the park, with counter-shaded, leathery skin, a long neck and a small head and large flippers. Drew looked at the creatures swimming past, "It's Elasmosaurus; a kind of plesiosaur", he told everyone. "Largely a fish-eater; not too dangerous, but it shouldn't be taken too lightly. They must be riding the wake, like dolphins." Suddenly, a large turtle glided past the Elasmosaurus; the team recognised it immediately. Drew smiled, "That's an Archelon; a living one.". Drew turned to his team and said "Right, that settles it; we're going down ourselves. Cynthia, you're with me. Jack, tell us if anything else is coming our way." Cynthia nodded, turned on her heels and headed off to put on her diving suit.

The pair got into the lifeboat and sailed out towards the location. Up close, they could see details on the Elasmosaurus that they hadn't been able to see before. They got their diving suits on and dived over the side of the lifeboat. Once they had plunged into the water, they noticed Elasmosaurus swimming all around them.

Up close, they could see details that they hadn't been able to discern before. Their skin was counter-shaded and leathery; some of the older individuals had scars on their bodies, from earlier encounters with predators. had a long neck and a small, broad, flattened head, with long jaws equipped with hundreds of small, sharp interlocking teeth (some in the form of paired fangs). Their limbs were large flippers; they were perfectly adapted to the life aquatic. Whilst the larger Elasmosaurus paid no attention to them, the younger ones were being rather playful and inquisitive. The juveniles were swimming close, but keeping their distance; some of them even allowed themselves to be petted, curious at these new creatures. It seemed that the plesiosaurs had instantly noticed the cattle prod she had and approached with caution, not wanting to be on the receiving end of what (to them) was a large, extendable claw.

However, they quickly noticed that the Elasmosaurus were swimming surprisingly fast; even their most determined attempts at speed-snorkelling rendered it near impossible to keep-up. Cynthia sighed, "How are we going to catch up to this lot?" Drew turned to her and smirked, "I have an idea." Drew waited for the nearest Archelon to swim past, before gently alighting onto its shell. When another came swimming past, Cynthia repeated the action. The turtles swam along, sedately, unaware of their new passengers. When they reached the Elasmosaurus and other Archelon and the time came to use the portal, Drew turned it on. The plesiosaurs briefly stared, transfixed at this strange, shining orb, before heading through the portal into the park. Drew and Cynthia released the Archelon they had been "riding" and it, too, swam through the portal.

Meanwhile, back on the boat, Jack, Leon, Alice and Adrian were watching the events from the starboard camera. Keehar and Mert were on the deck feasting on a bucket of fish the team had brought as bait. Jack whooped and said, "Our fearless leader's done it again! This might be the easiest mission we've had yet." Suddenly, the radar beeped, startling all the team members. Leon turned to the radar and said, "Umm, guys…"

Suddenly, something erupted from the water and impacted into the lifeboat.