The kids find the stolen puzzle box and try to hide it from the police. Erik returns home but is acting suspicious. Daniel finds a clue in the museum footage. After tough goodbyes, Max leaves for Spain.

Anika starts to put the pieces together and tries to warn Sal that he could be in danger. But it might be too late as the boys have already gotten themselves into a sticky situation.

The Hunter kids put on a diamond exhibition to lure their nemesis out of hiding.

It's a day of discoveries for the gang – Jasmyn finds a new clue but gets caught red-handed. Oliver stumbles upon a secret in the Hunter House. And Sal and Anika get a surprise when they revisit Diane's house.

Anika is sent an unusual birthday present – a miniature pyramid wrapped inside a torn treasure map. Sal discovers they are tied to a long-lost Aztec treasure – and an ancient curse. A new mystery has begun!

The Hunters set off for a family vacation, but all is not as it seems when their directions lead them to an abandoned house in the forest. Things get even stranger when they hear noises in the attic…

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The Hunters discover a secret room in the house. A clue sends Tess on the trail of a mysterious figure.

Max & Tess track the mysterious Rinus through Amsterdam and discover a cryptic notebook. Back at the Hunter house the other kids make a mess while trying to cheer themselves up.

Max and Tess follow a clue to an Amsterdam cemetery where they uncover an old family secret and unknown key. Meanwhile, Anika has suspicions about the new cleaning lady.

The kids begin to unravel the mystery around the missing red diamond. Max keeps a secret from his siblings.

The Hunter kids must band together to outwit one of their biggest opponents.

Erik is taken to the police station, where Daniel tries to find the evidence against him. Max talks to his birth parents.The police arrive to search the house.

Everyone reunites in the forest and Oliver finally learns the truth about Dottie. The kids formulate a new plan to find the treasure and save the Hunter Museum.

Sal and Anika return to the Hunter House to work with Rex on the mystery. And Oliver and Jasmyn finally uncover the identity of their secret enemy!

With the eclipse rapidly approaching and the final riddle solved, the kids must put their heads together and figure out how to stop their enemy and get to the treasure first.

Distant relatives Aunt Hedwig and Uncle Eugene are brought in to look after the Hunter children. The kids worry their relatives are more interested in the Hunter fortune than helping the family.

The Hunters attempt a high stakes exchange to rescue their parents while working to outwit Aunt Hedwig and Uncle Eugene.

A new foster couple temporarily takes in Anika and Sal while Max and Tess uncover news about the blue diamond.

The Hunters make a huge breakthrough but also suffer a big setback as they get closer to their ultimate goal.

The kids find evidence that could prove Erik's innocence. But someone hacks into Sal's computer and erases the footage! And Max realizes there is something strange about how his birth parents tracked him down.

Having figured out the workings of the mysterious map, the gang splits up in search of another riddle stone – but who will get there first? And who will get a fright in the forest?

The gang uncovers a second riddle, but cracking it proves tricky. And when an emergency means the Hunter kids must return to the city immediately, it looks like the treasure hunt is off for good.

Anika and Jasmyn escape from the attic, but not before gathering vital new clues. Sal and Oliver search for the next riddle stone, but they aren't the only ones looking for it. Who will get there first?

Anika's detective work leads her to uncover the truth about her past. Back in the forest, the boys are hot on the trail of the next riddle but find themselves getting stuck!