A family befriends a stray dog, names him Willy, and decides to keep him.

Though it means Nate can't get his dog ready for the smartest pet contest, he agrees to search for the missing prize for the contest.

Nate the Great, a junior detective, is determined to solve the mystery of the missing picture of his friend.

Nate the Great interrupts his backyard vacation to find his friend's lost grocery list--before lunch.

Nate the Great and his dog Sludge look for Annie's house key which has mysteriously disappeared.

As more and more of his flowers display the bite marks of a wandering tortoise, Nate sets out to uncover the mystery of the reptile's origins.

The animals awake from their winter hibernation and discover the first flower of spring.

Nate the Great finds mystery at the beach when Oliver's beach bag vanishes.

Nate and his dog Sludge try to solve a case on Halloween night and find themselves locked in a haunted house.

Nate the Great investigates two cases that may be connected, involving a missing valentine and a valentine that came from nowhere.