After morning chores Timmy and his new friend Ralph, who wants to be called "Boomer" set out to teach Boomer's dog, Mike how to herd sheep. The problem is poor Mike doesn't seem to know his own name. The news that a cyclone may hit Timmy's family farm has Timmy worried. After Uncle Petry tells Timmy that a cyclone could send a whole barn spinning up in the air. Timmmy decides the barnyard animals would be safer in the house. As the storm is about to hit Timmy, Mom, Dad, and Uncle Petree take refuge in the storm cellar. But wait? Oh no! Where's Lassies? He's run off! ...

Uncle Petrie takes Timmy and Lassie into town. Uncle Petrie treats Timmy to ten rides on a pony. Dressed out in his best "Roy Rogers" outfit, Timmy falls in love with a pony named "Star". Timmy needs guidance. He asks mom if he can pray to God for a new pony. Mom wisely tells Timmy that prayers aren't meant for the purpose of getting things. Not to be daunted, Timmy asks if he can wish really hard for the pony. The ever hopeful little Timmy sneaks in the idea that he's wishing for a pony to God after he thanking Him just the same for the soar throat He gave him last ...

When the Calverton school board wants to replace beloved Miss Hazlit to keep a budget, Timmy and the children work to make five dollars to retain her because Timmy has mistaken Ruth's remark about five dollars a week as an absolute.

Timmy breaks two eggs he is delivering to Mrs. Woodruff dodging dirt clods thrown by Boomer, replaces them with two owl eggs and when trying to replace the owl eggs winds up with Ruth, Boomer and the Woodruffs fending off an angry owl.

That old scamp, Uncle Petrie has filled Timmy's head with the notion that you can find gold by just sniffing the air for it. So Timmy and Boomer set out to find gold in the hills at the other side of the lake. All mom needs to know is where the boys are headed and to make sure they have food by packing them a lunch. She sends them off with a wave and admonishment to be home before dark. The boys do find something, but not gold. They find a crashed small airplane with an injured pilot still on board. The boys use their brains and give credit to their combined ages to ...

Joe Bascom wins at a charity auction a rocking chair that Paul has glued from pieces found in the barn loft to donate which Lassie is attached enough to remove from Bascom's property to use but angry Bascom blames Timmy.

Timmy needs an experience to relate at school so decides to use Lassie's attachment to a trout she caught but a greater experience occurs when Lassie guarding the trout against a fisher prevents injury from a failed barn timber repair.

Timmy and Boomer fall through the floor into the cellar of a decrepit old house that is about to be bulldozed.

It becomes difficult to confine to her quarters a year old sow about to have a first litter that Paul has acquired from Herb Simmons.

The son of a widow new to the property adjoining the Martins is afraid of dogs until Lassie rescues him from drowning during a fishing outing and he then wants his own dog but not until he learns he can not have Lassie by a loyalty test.

In an attempt to earn a Junior Audubon Club scroll, Timmy sights a rare to the area American Egret as part of his identification quota, a claim disbelieved by the group leader so that Timmy must ultimately identify different bird.

Lassie finds a bear shot with an arrow in the woods and left to die which the Martins nurse to health while they brainstorm ways to apprehend the renegade archers who practice this purposeless kind of thrill hunting.

Timmy's friends have difficulty accepting the Martin's visiting English schoolboy and Timmy's attention to the boy.

Uncle Petrie investigates sugar maples in the nearby "black woods" and discovers two men who have kidnapped a bank president. Luckily he has taught Timmy smoke signals and when he makes a fire for the criminals, manages to send out a signal Timmy can read.

Tongues wag in the neighborhood after Lassie picks Ruth's ticket as a winner in a raffle for a piano -- but the real loser is Timmy, who's forced to take lessons.

While the Martin's are Christmas shopping in Capital City, Lassie runs into traffic and is hit by a car. The specialist to do the surgery has gone to Lafayette for Christmas. A bunch of children and their pets start a prayer watch.

When an aphid infestation threatens the area, Timmy and Boomer decide to find ladybugs for control to sell using Lassie to track using ladybugs found in Lassie's coat as a clue.

Inspired by the pending war games scheduled for a nearby fort, Timmy, Boomer and friends play soldier and wander into a dangerous part of the maneuver area.

When Ruth has a flat tire, she chases her runaway spare tire into woods where she becomes caught in a holding trap placed by the state to capture a cougar forced into the area by a fire.

For a club project, Timmy and Boomer adopt a century old apple tree that is to be removed for the construction of a highway but the tree is saved for transplant in the Martin orchard when Timmy writes the President.

When Lassie continues to come home greasy, a pool of oil is discovered in the flax field which causes the Martins to dream of riches until Paul discovers a broken refinery pipeline.

An itinerant handyman fakes accident and injury and surreptitiously creates disrepair on the Martin farm to gain food and lodging which actions fool everyone except Timmy and Boomer.

When Lassie is found to be possibly descended from a very successful line of show dogs, Timmy is instructed on a regime to prepare Lassie for shows but the regime strains his friendship with Boomer.

Timmy is greeted with critical amusement when he enters the farm donkey in the county fair's horse grooming and obedience competition.

Despite warnings by Lassie and Timmy, the rest of the Martin's believe a devious cat that feigns injury and fakes pest control behavior while creating mischief is a special animal.

Paul Martin buys Ruth a new bonnet as a surprise and hide it in the barn but Timmy and Lassie ruin it while playing in the barn.

Timmy and Boomer are disappointed when they find out that Lassie puppies are to be sold, meanwhile Lassie hide her pups in the woods to delayed the sale.

Timmy enters a kite flying contest in his Cub Scouts troop but has to make a quick decision when his original kite is lost.

When Lassie is left at a neighbor while the Martins are at the country fair, the neighbor's pet chimpanzee causes havoc in their home which Lassie is blamed for.

Lassie becomes smitten with a puppet that look like another dog.

Timmy and Boomer are convinced that their new neighbor is a bank robber.

While looking for his lost good luck charm Boomer becomes trapped under a fallen tree.

Timmy and Boomer heartily disagree over the methods and tasks involved in the construction of a lean to but learn to work together when the boys and Lassie must rescue Boomer's visiting cousin Millicent from a cave ledge.

Lassie befriends a stray dog and finds a rambunctious runaway show horse which, after Lassie trains the stray dog to be a stable mate, becomes more calm.

While helping Timmy get pictures for a photo contest Paul and Uncle Petrie comes across a uncooperative man hunting pheasants on the Martin property.

Timmy wants his school to participate in The Lone Ranger Peace Patrol program encouraging children to save their money to buy saving bonds to support the United States.

At the church carnival Timmy and Boomer dresses Lassie as a fortune teller but it does not goes as they planned.

An unprepared city boy who has after a quarrel run away from his uncle with whom he is visiting leads Timmy and Boomer who are camping out in the Martin barn into danger in the woods.

When Boomer goes on an overnight visit, Mike who has been left in Timmy's care becomes shut in the trunk of the Martin's car while chasing his ball and taken to a garage where a fire starts.