Get ready for the Nature Cat aquatic event of the summer! After Hal's favorite toy falls down a storm drain, Nature Cat and the gang go on a quest to retrieve it – and learn about how our waterways are all connected! Nature Cat and the gang also make a new friend in Nature Dog, a new special friend who helps them navigate the oceans.

Today is the day of the Nature Quiz game show and Daisy has been studying non-stop! But while on the way to the quiz, the gang hears a spooky scary noise in the forest that stops them in their tracks. What could it be?! And where is it coming from?! Nature Cat is convinced the forest is haunted. Daisy thinks there must be a more logical explanation. Time for a little scientific investigation! Oh yeah! Oh yeah!

Man-oh-man! Something keeps knocking over Daisy's precious Pinecone Pals! Maybe it's the wind? Hal knows exactly who can protect the Pinecone Pals! Police officer Captain Pino Pineaconi, he's a Pinecone of Law! But when the gang returns from a fun game of hide-and-go-seek, they find the Pinecone Pals knocked over again! Who keeps doing this?! Captain Pino thinks its time to launch an investigation and the good captain is right! Time to look for clues. Tally ho!

Nature Cat and his pals are camping out on the beach! Sweet! While they're looking for seashells they run into Squeeks sea turtle friend, Celia, who just laid more than one hundred eggs. Squeeks wants to see the baby sea turtles up close and watch them run to the ocean. She hears the cuteness factor is off the charts! Celia's eggs won't hatch for a while, but she says there are lots of other nests on the beach and some of the eggs are bound to hatch tonight. Best. Beach. Campout. EVER! Time to find a sea turtle nest!

Today is the day of Hal's Aunt Riva's Nature Art Festival and Aunt Riva has a surprise. She's inviting Hal, Nature Cat, Squeeks and Daisy to be part of her Nature Art show. Hooray! Aunt Riva encourages everyone to let their creative juices flow and create their own nature art. The pressure quickly gets to Nature Cat and he's worried he'll never be inspired to make any nature, but Nature Cat just needs to take Aunt Riva's advice. He needs to relax and soak up nature. That should lead to inspiration! Onward and artward!

Houston's cousin Nigel is coming to visit next week all the way from England. Nigel wants to join Houston on one of his famous nature adventures. Daisy suggests Houston take Nigel on The Tough Track Adventure, a nature obstacle course happening the day that Nigel arrives. But Houston has a problem he's never been on an actual nature adventure before. He only assists his friends with their nature needs using his computer. How can he get ready for a nature adventure in a week? Never fear! Nature Cat and the gang will help!

During band practice, some unexpected guests interrupt. Papa and Mama Vole (and all their young'uns) pop up to see if they can bunk with Hal. They're having a little problem at their burrow so they need to find shelter. Hal is happy to have the company at first, but when the voles start to take over and eat all his plants, it's time to ask the voles to leave. Easier said than done, as getting the voles back in their home sets off a chain reaction of other animal habitat problems!