[5] The series was also broadcast in Czechoslovakia with dubbing in Slovak language during the 1970s and 1980s (Rangiho úlovok) Four children on a remote sheep station in the South Island of New Zealand hear of the escape of two convicts, and realise that the crooks are responsible for burgling their house while they were swimming.

The narrative device of the chase provides director Michael Forlong (who also wrote the script) with an opportunity to show some of the scenic beauty of his native New Zealand, and he also integrates some of the country's more interesting features into the plot, having the convicts finally spotted at a Maori gathering, and using the mud pools and geysers of the Rotorua thermal areas as the scene of the climactic chase.

The film also offers a taste of life on a remote sheep farm: the children, Maori and white, do their lessons together at the kitchen table, with the radio as their teacher; the only transport is by horse, and excursions to the nearest town are made by mail-boat.

The story moves along well, and – an essential ingredient of any adventure serial – generates enough suspense at the end of each episode to maintain interest until the next.

It is, moreover, beautifully photographed, with some splendid aerial and underwater shots and a very sinister sequence in the Waitomo caves, and accompanied by an interesting and original musical score.