Summary: Clayton Phipps and his son Luke put it all on the line for a risky raptor fossil buried under 30 feet of earth. And the Harrises decide to go for broke to prep their multi-million dollar T-Rex skull.

Summary: Clayton and Luke begin to excavate the deep overburden that covers the T-Rex site. And while Mike Harris travels to Utah to prep the Cowboy Rex skull, Aaron, Jake and Tori think they're on a bucket-list discovery at the Duckbill site.

Summary: When a wildfire surrounds his hometown, Clayton Phipps drops everything to help fight the flames. The Harris-Bolan crew excavates a new Triceratops' site. And the Abercrombie family discovers a Mammoth fossil map on their ranch in New Mexico.

Summary: Hoping to salvage his season, Clayton Phipps hunts for valuable Trike horns, while Mike Harris and his team believe they might be on to a world-record find. And fossil hunter Andre Lujan follows a 90 year-old map to a massive mammoth site.

Summary: Clayton Phipps makes a shocking discovery at the Trike site. The Harris-Bolan crew unearths what they believe might be an extremely rare Ceratopsian. And on the Abercrombie ranch, Andre Lujan digs up an enormous Ice Age Mammoth tusk.

Summary: With winter looming, Clayton and Luke race to excavate two massive trike skulls, while the Harris-Bolan crew searches for a crucial missing femur for their rare ceratopsian. On the Abercrombie Ranch, Andre discovers a mother-lode of Ice Aged bones.

Summary: Clayton gets news about the Nano sale and as a winter storm barrels in, he races to extract a rare trike tail. The Harris-Bolans have finally found evidence of Cerotopsian skull. And on the Abercrombie ranch, Andre struggles to excavate an enormous tusk.

Summary: When a valuable fossil is trapped in a precarious location, Clayton brings in a team of horses and a helicopter to help extract it. Mike comes face-to-face with Cowboy Rex, and Andre makes a difficult decision to save the Abercrombie's mammoth.