In the first episode, called Hot Welcome. Professor Larry Cross returns with his children, Pete and Web to their birthplace, New Zealand, after many years spent in England. But this proves to be the start of a family feud, starting with Professor Cross being arrested at the airport. And it's not only because of their beautiful vintage car, The Flying Kiwi. The family soon discovers that they have powerful enemies who want their house, land... and the Flying Kiwi itself
Dr. Cross looks for an ancient Maori amulet.
Complications ensue when Dr. Cross finds the tiki.
A widow is threatened with eviction, and Professor Cross tries to help.
Deborah wants her brother as crew in the sailing series, but the cheating soon starts, with their powerful uncle joining in.
An Egyptian exhibition, a terrified phone call, two mysterious deaths — and suddenly Professor Larry Cross is the only survivor of the team who excavated the Tomb of the Priest-King.
The Cross's magnificent vintage car which attracts attention wherever it goes, is stolen by a con-man who ingratiates himself with the Cross household.
On the topic of rare animals, this time the Cross family crosses swords with the business empire of their hostile uncle, James, to save a rare bird, the KoKaKo.
Professor Cross finds that his bank account has been credited with funds from the Archaeological Exploration Trust. This puts the professor in a hot spot as he has to explain the reasons for his receiving the money. Peter tries to solve the mystery by hunting through the memory circuits of a top secret computer.
Pete and Hone take their hang-gliders to the cliffs above the beach. At the same time, their uncle James Marriott's surveyors are at work in this nature reserve. Pete's kite crashes into the cliff-face, and there is no way to reach him in time.
Deb and Hone go to one of New Zealand's famous black-sand beaches to catch the waves while Pete joins the Beach ranger who has a different catch on his mind - poachers.
Things don't look good in the Cross household James Marriott only has feelings of bitterness for his relatives, the Cross family. But for Pete, he has tempting plans. With Meriana's ex-fiance reappearing in her life, and Hone wanting to join an outlaw motorbike gang. It looks as if the Cross household is going to break up.
Professor Cross has been offered a post at Cambridge and it looks as if things wont be the same for the family now. Meanwhile, an unexpected threat arises.
Tapou Maori island is sacred and an ancient phantom war canoe has been sighted on the lake.
A canoe with a skeleton on the prow keeps appearing from the mists and guys in Maori-style dress scare the natives. Pete is abducted by them and revealed as a convert to the cause as the masks are all pulled off.
Professor Larry Cross beautiful 1929 Vaaxhall Hurlingham, (after which the series takes its name) is the family treasure and the pride and joy of the professor. James Marriott, Professor Larry Cross's rival to his property, has an expensive thoroughbred horse, Auckland Star. He intends to use the horse to earn himself some money.
Peter runs away from home.
A deadly, infectious disease is plaguing the animals around while the Marriot Research Laboratory is trying to find an antibiotic that will arrest the disease. But Dr. King, the lab researcher, plans to blackmail James by threatening to spread the deadly virus.
ln this episode No Option, James Marriott intends to make another fortune from his old family estate. With the city encroaching on the surrounding farmland, he plans to sell part of his estate at a profit. But he is worried about the old lease of Pete's and Deb's school As a solution, he offers the school an option of buying over the land.
Cross and his children have recently arrived in New Zealand from England. Miriana buys a used car at a cheap price, which surprises everyone in the family. To make doubly sure she has not been cheated. Hone, the mechanical wizard checks it out and finds nothing wrong with it. But when the car disappears from the car park, the reason for its cheap price becomes evident.
Professor Cross' favourite wine comes from a small vineyard, which has to close down.
Steve seems busy with a charity fund, and convinces Pete to sit for the university's first year examination for him. It is only when Ratu tells Pete that there have been similar cheating cases that Pete realises Steve is dishonest.
Professor Cross believes he has stumbled upon Du Fresne's bottle, a historical relic which recounts the battle between the Maori and the French.
Flying around in their radio-controlled model of a First World War plane, Pete and Hone enjoy the natural scenery of the land and find the past catching up with the present.
A spate of letter-bombs puzzles the police. And lawyer Ratu Rewiri is as puzzled as they are.
While Professor Cross is away at a conference in San Francisco, Pete and Hone get busy on the house. Deb prefers to dabble in spirits.