[1] It was written by Patricia Latham and produced by Willis World Wide for the Children's Film Foundation.

They find Joe, and Maisie brings the river police who arrest Jack, Chrissie and Fred.

The Monthly Film Bulletin wrote: "The examples of public-spirited behaviour invariably endorsed by the Children's Film Foundation seem sometimes strangely at odds with the implicitly disregarded dangers often found in some of the Foundation's high adventure movies.

The fact that the kidnappers in this energetic yarn are so patently inept seems sufficient cause for the makers to have passed up the chance for a sensible and, one would have thought, timely warning about the perils of going-it-alone in just such a case.

There is no suggestion that the lightly-clad Joe's subterranean ordeal may have been anything but mildly trying; in view of this, the paternal Mr. Oliver contents himself with a commendation to Steve and Maisie for fulfilling their community-service project: thanks to them, Smithy has proved he can handle his dog and is thus able to take a coveted new job.