Dunc Culpepper and his friend, Amos, are after a band of doll thieves. When a doll is stolen from the local mall, the two boys put on their detective gear, but will a vicious watchdog stop them from retrieving the valuable missing doll?.
Amos decides to perform on the trapeze at the visiting circus. But before his best friend Dunc Culpepper can talk him out of it, the two stumble across a mystery behind the scenes at the circus.
Deciphering a code they find in a library book, Amos and Dunc stumble onto a burglary ring. The burglars' next target is the home of Melissa, the girl of Amos's dreams. Amos longs to be a hero to Melissa, so nothing will stop him from this case.
Dunc is sure the old Rambridge house is haunted by the ghost of Blackbeard the Pirate. Then they meet Eddie, a meek man who claims to be impersonating Blackbeard's ghost in order to live in the house in peace. But if that is true why are flames coming from his mouth?.
Dunc and Amos are bound for Uncle Woody's Santa Fe cattle ranch for a week of fun. Who's been making off with all the prize cattle? Can Dunc and Amos stop the rustlers in time to save the ranch?.
Dunc Culpepper and his best friend find a parrot in a pet store who has outlived ten of its owners and is 150 years old. Then the bird starts mouthing off about buried treasure and the amateur sleuths get excited.
When Dunc and Amos research the Civil War, they enter a time portal and find themselves in 1862 on the day before the historic clash between the Monitor and the Merrimac. Will they make it back to the future?.
While Dunc and Amos are at summer camp. They overhear a threat against the camp director and discover that camp funds have been stolen. Do these crimes have anything to do with the tattoo that some of the camp staff have on their arms?.
Best friends Dunc and Amos meet up with a new buddy named Lash when they enter the world of skateboard competition. When somebody steals Lash's skateboard, the boys are determined to get it back.