Young Frank and Joe Hardy are on the case when the actor who plays the comic character Morpho the Morph Monster comes to town for a fan day only to have his famous Morpho Spork go missing.
Eight-year-old detectives Frank and Joe Hardy work together help their teammate find his missing baseball mitt before the last game of their little league season.
Frank and Joe Hardy are suspicious of Max O' Malley, a new kid in town who claims to be a magician, and when Mrs. Briar's prized show dog arrives and Charlie begins to disappear and reappear, Max becomes the prime suspect.
Frank and Joe are the most promising contestants in the annual Junior Bike Race in Bayport, but when Frank accidentally runs over a nail a blows a tire, his bike disappears and everyone becomes a suspect.
While visiting the Bayport Natural History Museum after learning all about dinosaurs in school, Tico makes the discovery of the day when he finds an old dinosaur tooth on their dig on the museum grounds, but after the tooth goes missing it's up to Frank and Joe to solve the mystery.
Joe and Frank Hardy win a contest to be handlers for a Green Crawler balloon in the annual fall festival, but when the balloon is sabotaged the day before the parade, the brothers must investigate.
The Bayport Battle of the Bands will showcase the best local bands and Crush, led by Dylan is sure to win, but then Dylan's bass guitar disappears and the band is out of the running unless Frank and Joe Hardy can find it fast.
Frank and Joe Hardy are suspicious of Max O' Malley, a new kid in town who claims to be a magician, and when Mrs. Briar's prized show dog arrives and Charlie begins to disappear and reappear, Max becomes the prime suspect.
Frank and Joe Hardy plan to compete in the local arcade tournament, agreeing the winner will get to move into the cool new room built by their dad, and when money goes missing from the competition, they work together to solve the mystery.