The gang investigates strange voices in Busytown Museum.

Huckle wants to find out why a smoke alarm keeps going off but there is no fire.

The kids' sand castle gets trampled overnight.

A set of ski tracks runs on either side of a tree.

The gang searches for the owner of a mysterious sketchbook.

A strange temperature drop turns Busytown's summer into winter.

Huckle, Lowly and Sally set out to discover why their mini putt balls are disappearing.

Gold coins Mr. Fix It found on the beach disappear.

Huckle and the gang search for a priceless treasure hidden somewhere.

Huckle and the gang search for a priceless treasure hidden somewhere.

The gang sets out to find out who is painting red spots throughout Busytown-

Huckle and Sally and Lowly try to figure out who would own a tiny piano.

Huckle and the gang are puzzled by a puddle full of goldfish.

Sgt. Murphy's radio receives a mysterious message.

The gang finds numbered papers blowing around the park.

The milk in the store Father Cat runs is sour.

A lost bag is discovered.

Huckle, Lowly and Sally investigate when flat tires of Busytown cars happen everywhere.

Sally, Huckle and Lowly look for the lock that fits the old key they've found.

Huckle and the gang are puzzled when they find chocolate sauce on Lowly's apple car.

Ginormous sneezes come from Hilda when she gets into Sally.

Lowly and Sally try to figure out why laundry keeps disappearing.

The gang investigates when the newspaper does not show up at the houses.

Huckle, Sally and Lowly find a huge tooth.

Huckle, Lowly and Sally investigate a strange discovery of a big number 10.