Year: 1967
Location: Ku-ring-gai Chase National Park, Sydney & Duffy's Forest
Description: An explosion rings out across the park. Sonny follows the sound of the explosions and discovers that the Archer Corporation is searching for oil in Waratah Park. Realising his friend, Mr Trundle ( Miles Vincent Archer ) is the only person that can fix the problem, Sonny stows away in the back of the station wagon on a trip to Sydney. Sonny enters the Archer Corporation, located inside Australia Square, only to find out Mr Archer hasn't been sited in months. Sonny has an idea to locate Mr Trundle through the radio school. This leads Mr Trundle back to Ranger Headquarters. After a second trip to Sydney and their meeting with the Archer Corporation, Mr Trundle, Sonny & Skippy have made another happy ending.