This rarely seen 1969 stand-alone production takes place in the famed Waratah National Park and continues the intrepid adventures of young Sonny Hammond (Garry Pankhurst) alongside his ever-reliable marsupial friend.
The Intruders arrive in the form of two suspicious divers (Ron Graham and Jeff Ashby) seeking a park permit to carry out regulation abalone fishing. With their request granted by Chief Ranger Matt Hammond (Ed Devereaux) they begin an underwater operation which involves a clandestine treasure hunt in a submersible to retrieve the cargo of lost gold from a sunken wreck.
When Sonny, Clancy (Liza Goddard) and Skippy discover the truth behind the diver's duplicity and uncover a complex smuggling ring in the process they are captured and summarily locked up. With Matt and Flight Ranger Jerry (Tony Bonner, The Lighthorsemen) on the case, aided by a sympathetic woman named Meg (Jeanie Drynan, Muriel's Wedding) it will take nerve, ingenuity and every trick in Skippy's pouch to get them out of this tight bind. 1969 Woomera Productions