2012
Shelldon establishes himself as a cool athlete on the trampoline. But when a new kid, Nelson, comes to Shell Land and demonstrates his skills as an expert spelunker, Shelldon knows his star has been tarnished. He makes claims to show he is knowledgeable about spelunking and then challenges Nelson to a hunt for treasure in a cave near Shell Land.
Aliens plotting to take over the oceans, but specifically Shell Land and its inhabitants. Not to be left out (and to protect his friend), Shelldon joins their first crusade. But to no avail, when they go to the oil rig they immediately run into aliens who are trying to save them, but who our kids think are out to harm them. In the rush to get away, Herman's uniform is lost and they are in deep trouble.
2012
The old amusement park in Shell Land has fallen upon hard times. The park's owner cannot invest in new equipment or upgrade the old rides so that kids will enjoy them. As a result, the city wants to sell the land, and Cracken is poised to develop a new hotel complex. The kids realize they need to have a plan to save the amusement park.
2012
When Herman's grandfather, Moe, comes to live with him and his mother, Herman immediately notices something different about him-he's even older than he remembers. And his Grandpa, known for his exploits against the two-legged aliens, seems to lack the energy and alertness he once had and he repeatedly doesn't recognize Herman and tells the same story over and over.