When her dog Rover is accused of tearing up Mrs. Ruston's tomato plants, Noelle investigates with her friend Todd and finds long yellow hairs that may point to the real culprit. Hair, hair, everywhere, someone's been digging up Mrs. Ruston's tomatoes. She thinks it's Noelle's dog, Rover, and unless Noelle can find the real thief, Rover's in big trouble. It's the hairiest case yet for Mr. Merlin's Third-Grade Detectives. Hair in Mrs. Ruston's tomato...

Jigsaw Jones finds himself in competition with Reggie for the title of the best detective in town. Reggie relies on technology and charm to solve mysteries. Can Jigsaw prove that he is better?

Harry's interest in solving mysteries has caught the attention of his classmates in 3B, so he challenges them to discover what he has hidden in a giant, old suitcase.

The Third-Grade Detectives are looking forward to their field trip to a local art museum, where a priceless fifteenth-century statue of Joan of Arc is on loan from a Paris museum. But they discover the statue has been stolen. The police find the statue smashed and thrown in a Dumpster. It looks like a case for the Third Grade Detectives even if the museum director doesn't want their help.

Using her excellent memory, Cam Jansen, aided by her friend Eric, investigates the disappearance of Mrs. Scott's valuable pearl necklace during a charity brunch.

On a field trip to the zoo, Cam Jansen uses her photographic memory to help solve what happened to Danny's lunch.

Eight-year-old Ada and new friend Tycho help Nina by coding a website displaying her online portfolio, then work together again to document a case of fraud.

The High Rise Private Eyes, animal detectives, try to find the cat who stole their neighbor's binoculars.

Eva Wingdale and her class are excited about their trip to Poppy's Pumpkin Farm, where every year, there is one very large, extra special, thank-you pumpkin; but on the second day of the visit the owls find that the Thank-you Pumpkin has gone missing, and the farm animals are in an uproar -- so Eva and the other owls turn detective to solve the mystery of the missing pumpkin.

While having breakfast at their favorite diner, two detectives, Bunny and Jack, solve a mystery that is not what it seems.