When all the letters from the mailbox to the North Pole disappear, Sushi brings Dexter and Peanut to the mailroom hoping they can help. Will they find the culprit in time to deliver the letters to Santa?

Dexter is asked to participate in this year's Gingerbread contest. The Frenchies vs. The Pugs. But when he arrives, something is amiss ... will Dexter solve it in time before judging begins?

The Museum of the Dogs has been robbed! Eight precious artworks are missing and the museum's curator, Elliot, needs Dexter's help to get them back.

Turnip needs Dexter's help after The Mashed Potatoes go missing! Will they find them?

Lana & Lucky are back! They're all grown up and they need Dexter's help. Someone's been stealing all the nuts in town, and now, there aren't any left to make the Thanksgiving stuffing! Detective Dexter is on the case!

Someone's taken Rev the Racer's Go Kart! With the big race coming up, he needs to get back behind the wheel. Will Dexter help him track it down in time?

Dexter tells Peanut and a few friends the story of Oscar Deville, the famous film star dog, who's said to have run off to a secret world.

When Eloise the dapple Dachshund finds a pair of vampire teeth in the flower bed outside her building, she goes straight to Dexter. Are they just part of a Halloween costume or is there a vampire on the loose in New York City?! Dexter is on the case!

The Ghost Cats are back! And this time, they're scaring everyone before Halloween. Can Dexter and the dogs of New York City stop them in time to Trick-or-Treating?

Gruber's costume has gone missing! He's a ghoul every year, and this year cannot be any different. But his costume shrunk in the wash and now it's gone. Can Dexter help him find it?