The final villain is revealed as the children race to solve the last clues and unlock the mystery.
The Hunters make a huge breakthrough, but also suffer a big setback as they get closer to their ultimate goal.
The Hunter children must band together to outwit one of their biggest opponents.
The Hunter children capture a surprising trespasser and must hide their new guest from Tim and Simone.
Max tracks a possible suspect while the other children search the house for new clues; Anika takes on an unlikely mission.
Reviewing details from the first five episodes of the series and giving a preview of the rest of the season.
Tess journeys into a maze of underground tunnels to find the red diamond; Max has to conquer his fears; the Hunters get a surprise visit; Max and Tess meet with the hooded figure.
Tess and Max work together to trick their foes; Anika does not want to celebrate her birthday.
When the discovery of an old map points the children toward the red diamond, Max makes a secret deal with a nemesis.
The children begin to unravel the mystery around the missing red diamond; Max keeps a secret from his siblings.
A new foster couple temporarily take in Anika and Sal while Max and Tess uncover news about the blue diamond.
The Hunters attempt a high-stakes exchange to rescue their parents while working to outwit Aunt Hedwig and Uncle Eugene.
When distant relatives, Aunt Hedwig and Uncle Eugene, are brought in to look after the Hunter children, the children worry their relatives are more interested in the Hunter fortune than helping the family.
A mysterious message helps the Hunter children track down the elusive "Magpie," but it may be too late as others suspect the children are home alone.
The Hunter children put on a diamond exhibition to lure their nemesis out of hiding.
Max and Tess follow a clue to an Amsterdam cemetery where they uncover an old family secret and an unknown key; Anika has suspicions about the new cleaning lady.
Max and Tess track the mysterious Rinus through Amsterdam and discover a cryptic notebook; at the Hunter house, the other children make a mess while trying to cheer themselves up.
When Max gets into trouble at school, the headmistress decides she must speak with his foster parents; the children scramble to distract the headmistress from their foster parents' absence.
The Hunters discover a secret room in the house; a clue sends Tess on the trail of a mysterious figure.
The Hunters stay home from school to search for their missing parents and find more than they were expecting in the Hunter House Library; Anika leads a museum tour.
Max wakes up in his new foster home to discover his foster parents have vanished; Max and his new brothers and sisters embark on an adventure to find them.