Cadillacs and Dinosaurs

Hammer cuts Hannah and her expedition off with an ambush. Jack heads to a burning town where he is blamed for the attack of a Shivet. Wilhelmina is intent on destroying every settlement and Jack. At the coast to the Ocean City, Hannah mistakes Jack for a poacher. Jack takes Hannah to his garage to meet Mustapha and Hermes. Jack goes off to eliminate the rampaging shivet, but instead finds and destroys the receiver Hammer attached to its neck. After a long fist fight with Hammer, Jack scares off Hammer. Jack confronts Wilhelmina with no results.

An earthquake causes a herd of Macks to stampede through a village. Wilhelmina intends to exterminate them which Jack points out will disrupt the ecological life cycle. Jack is promoted to take care of the threat. Jack plans to rally the Macks away with three Cadillacs and aid from Hermes. Jack manages to herd the Macks and thwart Hammer's ambush attempt. The Mack leader destroys Mustapha's Cadillac. Wilhelmina makes a deal with Hammer to ruin Jack and kill all the Macks. Hammer detonates dynamite and smoke bombs in a nearby pass, but Jack counters him and drives his men away. The Macks make it to their new home.

Dr. Fessenden shows Wilhelmina a satellite laser, but needs to get to the station in Grith territory. Wilhelmina requests Jack to take Dr. Fessenden there. They avoid a Shivet on the way. Jack receives a talisman from the Griths. Hammer abducts Dr. Fessenden, finding out about the Death Ray. Jack, Hannah and Fessenden reach the station and Hannah finds out Dr. Fessenden's true intentions. Hammer catches Jack and Hannah. Before the laser can be tested on them, they escape. Hammer intends to destroy Sea City. As Hannah re-aims the laser on the station, Hammer's lot flees. Jack rescues a Zeek's baby before the station blows up. Jack leaves the talisman to the Griths.

After Jack stops Hammer from poaching tri-colored Sandbucks, he swears revenge. Mikla goes undercover getting in Jack's inner circle when she thwarts a minor attack from poachers. Hammer sends his full force to siege Jack's garage. Before Jack and his men can fire the lava launchers, they malfunction from the valve Hermes damaged earlier. Jack descends into the crater to reach the source having difficulty along the way, but turns the main valve. The attackers are warded off, but Hammer penetrates and captures everyone. Jack tricks Hammer into turning on the water system that flushes them out of the garage.

Jack and Hannah go for an expedition to a mine. When they are chased by a herd of Stegosaurus, they find a wild boy amongst them. While Jack investigates the mine, Hannah goes after the boy, saving him from a Pterosaur. Jack tries to help a wounded Sandbuck, when Hobbs attends to it and asks Jack to find the wild boy. Jack learns from a Grith that they raised the boy after saving him from hyenas. Hannah is attacked in a lake by a sea dinosaur, but the boy talks to it. Hammer sees this as an opportunity to pin the Sandbucks. Hannah refuses to let the boy go until Hobbs explains how they raised him. Hammer kidnaps the boy and uses him to talk with a slither. Jack and Hannah rescue the boy and the slither, Hammer following in pursuit. The boy is then returned to Grith.

Jack and Hannah go to the Mall Market to trade. Hannah swipes a top secret file. Jack runs into a Mack and finds the river dried up. Hannah finds out the document is the property of Wilhelmina regarding an ancient laboratory. Jack finds the river has been dammed up so that Wilhelmina's men can excavate the lab. Hannah is caught but Jack assists her. Dr. Fessenden activates a deadly robot. The robot activates other robots becoming a threat even for Wilhelmina. The diggers destroy the lab. The robots have survived, but Jack destroys the dam to bury the dig site.

Jack extracts rubber from trees, while Laschard blasts a ravine disturbing a family of Stegosaurus and getting himself trapped. Wilhelmina has uncovered a train. Hannah knew a similar train with toxic material nearly wiped out her people, so she and Jack get some flowers which are an antidote. Wilhelmina assigns Laschard to kill Jack. His attempts fail. Wilhelmina tries to abort Laschard's assignment when she sees the ill state Mustapha is in, Laschard doesn't listen. Jack and Hannah fail to get Laschard's car as a cutter stands guard. Next day Jack turns a group of cutters against Laschard and diverts the cutters into a river. Jack and Hannah reach the Sea City and provide the flowers for the antidote.

As Jack docks at Sea City, Kirgo is taken away by a Whiptail. Jack and Hannah investigate the night disappearances and the Whiptail. They are attacked by the monster inside an excavation tunnel. Wilhelmina refuses to believe Jack's findings. Jack and Hannah try again to track the Whiptail. As the whiptail passes them, Mustapha arrives with Jack's Cadillac. When they try to lure the whiptail it abducts Mustapha. Jack chases the Whiptail in his car until he finds her lair. They find Kirgo and Mustapha and that the Whiptail has no babies save one. Hannah rescues the Whiptails and sorts out the excavation problem the following morning.

Jack and Hannah successfully evade a Shivet and uncover a storage capsule, with a hibernating man. The man is called Adamus. Jack takes him and Hannah to meet an old friend Captras. As Adamus prevents an accident, Hammer spreads word of his presence to Wilhelmina. Jack evacuates Adamus and they run into the Shivet again. When Adamus drives it away, Jack discovers Adamus is an android, while Wilhelmina uncovers the capsule and a codebook inside. Adamus is suspected to dangerous and sure enough Wilhelmina arrives and Dr. Fessenden takes control of him. As Wilhelmina uncovers an explosives cache, Adamus fires a missile causing a volcano to erupt. Hannah turns Adamus against Wilhelmina. Jack and Adamus successfully block the volcanic lava flow from the settlement. Adamus is put back into his capsule.

Jack is arrested after he fails to stop Hammer salvaging the government's pile driver. In court, Jack retells the time the pile driver was in testing and Hammer in pursuit of it. Jack is tried guilty, but escapes from his sentence. Wilhelmina hires a bounty hunter called Brink to capture Jack. While Hannah searches for evidence, Jack pursues the poachers only to be caught by Brink, but he gets away. Hannah soon finds evidence on Captain Noc's person and divulges the truth to Wilhelmina. Jack destroys the tech house and Brink arrests Hammer.

As preparations are made at the harbor, a Thresher attacks and heads up the city canal raiding a fish market. Jack scares away the Thresher. Hannah brings a flock of Zeeks to the city despite Wilhelmina's disapproval. Hannah decides to leave for her hometown. Jack tries to convince Hannah to let him escort her. As they go their separate ways, Jack gets attacked by a large war tank. Jack is captured by Lars Striker. Jack refuses to assist Lars and plunges into a river, Hannah coming to his rescue. Together, they stop Lars and destroy his tank. The zeeks prove to useful against the Threshers.

Jack barely escapes from a Bonehead. Back at the garage Jack meets his old buddy Sean Rustle. Hannah doesn't find him good company. The next day Jack returns to find Hermes drugged and his Whirlybird engine stolen. Shortly, Hermes and every other dinosaur acts very strangely. The wild child takes Jack and Hannah to the Grith lair where they are dying from the lifestone been stolen. Jack retells how Sean was always one step ahead of him. Sean reveals his deceitful nature. After blasting Sean out of his chopper, Jack decides to do a rematch race against him. Jack outruns Sean, Hannah saves him from falling, and they return the lifestone to the Griths.

Hannah manages to maneuver Jack's Cadillac past an earthquake area. Hammer sets fire to the jungle with dynamite. As Jack investigates the fire, Wilhelmina assigns him to deliver nitro glycerin to blow the canyon escorted by the poachers and Mustapha. The convoy runs into a sick Tree Grazer, but Hannah helps it. The convoy manages to cross an unstable bridge and avoid Laschard. Hammer loses one of the trucks. At the river, Hammer tries to dispose of Jack, but he and Hannah fires at them. Hammer recruits Laschard to assist him. With more pursuing, Hannah drives the Cadillac and crashes into the canyon wall, blocking the fire.