The female Tyrannosaurus continued to send out her low, sonorous mating call through the forest, hoping for any nearby male to hear it. Suddenly, a series of short, deep barks echoed through the forest. She followed the source of the sound to see a male Tyrannosaurus, about the same age as herself, appear out of the mist, standing over the corpse of a subadult Edmontosaurus. She walked towards the carcass and began to feed. The male walked off, allowing her to feed. On this occasion, both have been lucky; she because she had not ended up having to call for days, he because he had been the first male to respond.

The male knew he could not approach the female and mate; that would only lead to more injuries. To solve this, Tyrannosaurus use a ritual called "courtship feeding", in which a male makes a kill and uses the carcass to attract a female. The larger the kill, the more likely the female was to stay and the more likely the male was to mate. As she ate, he advanced towards her, making reassuring coughing sounds. He then sat up, puffing out the red wattle under his chin in an attempt to impress her. However, she opened her mouth wide and hissed – she wasn't ready to accept him yet. He hovered, but she was showing no interest for now. However, soon, she would allow him to stay with her; she would no longer be alone. Having a mate would allow her increased hunting success and an increased protection of territory, eggs and offspring.

In a dying world, it was important to stick together.

Drew and Cynthia barely had time to put their diving masks on as the lifeboat they were on was suddenly impacted, knocking them into the water. Once they recovered from their disorientation, they looked around to see themselves surrounded by several, sandy-brown coloured mosasaurs. They looked like gigantic versions of the Haliosaurus from the shallows; the largest must have been forty feet long. Drew knew what they were immediately, "Tylosaurus. Our targets. They must have thought the boat was a turtle." The Tylosaurus were choosing the boat over the humans; the lure of the perceived larger meal outweighed the appeal of attacking these small morsels.

Meanwhile, on the Mariner… "Guys, there's something coming! Hello? Can ANYONE hear me?!", Jack screamed into the communicator, as Leon, Alice and Adrian stood around, looking nervous. The situation was urgent; they needed to warn Drew and Cynthia that several large shapes, presumably Tylosaurus, had been detected on the radar, heading directly towards them. However, something was wrong; their in-suit communicators weren't getting the message. The three looked at each other, worried ; hopefully, they'd get the message.

Back in the water, the Tylosaurus were still occupied with the boat; Drew and Cynthia were not moving. They didn't want to provoke one of the predators into attacking them. There had been an incident when a smaller individual approached and snapped at them, but otherwise they had ignored the two humans. Suddenly, their in-suit communicators hissed and Jack's voice crackled over the radio, "Drew? Drew! There are giant mosasaurs coming towards you and it might be best to-". Drew chuckled, "It's a tad too late for that. We've already met them. They sank the lifeboat." Jack chuckled awkwardly over the communicator, "Sorry 'bout that. Anyway, stay where you are; we'll come to you. We have a plan, fearless leader."

The Ancient Mariner sailed towards the upturned lifeboat, following the surfacing tylosaurs. Jack watched the spectacle and said, "Get the dead Archelon out from the hold." Alice looked at her brother, confused, "Why?" Jack turned to her, a smirk on his face, "The tylosaurs attacked the boat because they thought it was a turtle; let's give them a better meal."

Back in the water, Drew and Cynthia were waiting, for whatever plan Jack may have had come up with. Whatever it was, he had to be quick; soon the Tylosaurus would run out of patience with the boat. Suddenly, there was a noise and something very large impacted the water, hitting the water so fast it was, for all intents and purposes, a blur. The mosasaurs turned to look at it and Drew and Cynthia peered at it in confusion; when the bubbles cleared, they could see that it was the dead Archelon they had found. Drew laughed and said, "Jack's using the Archelon as bait! I knew it'd come in handy!"

The tylosaurs turned their attention from the lifeboat to this new, more substantial meal. This gave Drew time to lift the portal remote and point it directly at the carcass, which got sucked through the portal. Unchanging their trajectory, the mosasaurs followed the carcass through the glowing orb, moving as if a single entity. Drew sighed; the adventure was over. Jack's voice crackled over the radio, "We're sending down the shark cage to pick you guys up. After that, fearless leader, I think it's time we all went home." As he said this, the shark cage was lowered into the water, and Drew and Cynthia swam into it. Once they were both in, with Drew closing the door, the shark cage was lifted above water and. Drew walked up to Jack and shook his hand, "Good plan." Jack smiled, "Think nothing of it, fearless leader; you probably would have done the same." Smiling, Drew activated the portal and the Mariner sailed through to the present.

After a while, everyone was at home. The marine reptiles had been transferred to their new accommodation in the aquarium. The Hesperornis and the Archelon were both being kept in large exhibits in The Cove, all of which had land areas for resting and nesting (when the time came); they were either swimming around or basking on the rocks in their exhibits. The Haliosaurus and Xiphactinus were each being kept in large tanks in The Cove; they were all currently exploring their new territory, waiting to be fed. The Elasmosaurus had been given the largest tank in the Cove; they were all currently swimming around, waiting for their next meal. Meanwhile, the Squalicorax were being kept in the aquarium's shark tunnels. It was decided that the Pteranodon could share an aviary with the Nyctosaurus in the pterosaur section, since they were both fish-eaters and unlikely to harm each other; they were exploring their new home, waiting to be fed. The Tylosaurus were being kept in a gigantic exhibit in Hell's Oceans;. They were currently swimming around their new territories, waiting to be fed.

Next time on Prehistoric Earth

The team go back to Cretaceous Montana

(A Tyrannosaurus snarls at an Ankylosaurus)

On their most dangerous mission yet

(A pack of dromaeosaurs attack a Jeep)

To save the last of a dying era

(Drew and a Tyrannosaurus watch a meteorite hit the Earth)

All next time on Prehistoric Earth: A Continent of Blight!

Animals rescued:

Hesperornis regalis: 26 (13 males, 13 females)

Squalicorax falcatus: 16 (9 males, 7 females)

Xiphactinus audax: 31 (14 males, 17 females)

Halisaurus platyspondylus: 8 (4 males, 4 females)

Pteranodon longiceps: 32 (11 males, 21 females)

Elasmosaurus platyurus: 38 (13 males, 25 females)

Archelon ischyros: 17 (5 males, 12 females)

Tylosaurus proriger: 7 (3 males, 4 females)