Dr. Hunter discovers signs of the littles in Grand Valley and goes after them while the little family tries to stop him.
The Biggs find a statue of King Iota, Ruler of The Lost City of the Littles. Dr. Hunter steals the statue from the museum and the littles have to get it before he deciphers an inscription it about the littles.
Henrys friends make him stay in an old ""haunted house"" in order for him to join their bike club. The Littles find out that his friends are going to scare him out of the house, so they go to the house to warn henry and give the kids a taste of their own medicine.
The Littles make a movie, ""The Little Wizard of Oz"" with an old movie camera in the attic, Tom gets jealous because Lucy got the best part and throws the film in the dump instead of giving it to henry but the film falls in one of Dr. Hunters traps and they set off to get it back.
The Littles help an old blind lady find some lost money before the greedy landlord, who found out about it in one of the ladies diarys, finds it and steals it.
Dinky enters a constest in the paper for a gas-powered airplane, He wins but cant get the plane because hes is a little. Dinky takes off to get his prize at the Midget Models Co. in the Big City. While Tom, Lucy, Grandpa and Henry go to the same place to stop dinky.
Helen Little(mom) breathes in one of Dr. Hunters chemicals he sprayed to get the littles and becomes very sick. The only medicine they can get her is in the Bigs Clinic so Henry pretends hes sick and goes to get it.
Rats attack the Littles home.
Henrys Friend Marie runs away and lucy goes with her in the backpack, so the littles go looking for Lucy and Marie, but the walkie talkie they are speaking to Henry on is being traced by Dr. Hunter
Dinky tries to doctor a hurt bird.
Grandpa, Dinky, Tom, Lucy and the rest of the Little Scouts are out camping in the woods. When a Jet Above them fails and the pilot parachutes right down by them. The Littles work hard with a bears help to get the unconscious pilot to a nearby cabin
Henry and Marie are chasing a rabbit when they fall in an old abandoned Mind Shaft. Dinky sees them fall in and the rest of the littles go to help them. While Henry and Marie discover an old gold prospector in the mine, who forces them to carry his tons of gol out of the shaft.
Dinky and Grandpa are flying in Dinkys airplane delivering Dinkys Airmail Pzza, When he hits a powerline and the crashes. Dinky has a dream that Dr. Hunter see them, breaks down the biggs walls and more places to find littles, and captures all of them. Henry tells Dr. Hunter all about the littles and becomes famous. Then Dinky wakes up freaking out.
