Jane and fellow 4D agents Tricia and Olly, along with their dog, hang out in an old canal boat club house in a disused area of the Thames River. Disused that is until a gang of jewel thieves hide their spoils nearby ready to be transported by boat to the buyer.
Steve, a young Dexter Fletcher, and Danny find the boat and scupper the thieves plans by making off with the jewels to hand into Janes dad, who just happens to be a policeman. Then things for the 4D agents go wrong when the thieves catch up with them.
It's a fun 'scooby doo' like affair with an underlying message of 'don't mess with strangers kiddies'. Kind of an hour long public information film, also popular in the 80s. But with a boat and helicopter chase at it finale.
It's a little dated by todays standards but still enjoyable.
And just what were the 4D's....don't accept sweets from strangers, don't get into a car with strangers, phone the police if you see something suspicious and...er...some other such stranger related nonsense.
