Timmy and Boomer try to teach Boomer's new dog Mike, a distant little terrier, farm ways, but he seems unable to learn.

Uncle Petrie allows Timmy to ride a pony at a pony-ride concession, and Timmy falls in love with the animal--so Lassie sneaks out in the night and brings ""Star"" home.

Timmy and his classmates adore their teacher Miss Hazlit, and when they find out she may have to leave because of budget constraints, they try to earn the money to keep her on. But the money is lost on their way to speak to the school board.

Timmy and Boomer are so desperate to be useful that Ruth entrusts a fresh egg delivery to the boys, but they're sidetracked by an aggressive barn ow1 after they try to replace two broken eggs.

Timmy and Boomer run to see a plane crash and don't know what to do when they find the injured pilot in the wreckage.

Lassie falls in love with a rocking chair destined for donation to a benefit sale, and when it's sold, she determines to do something to get it back.

Timmy brings home a rainbow trout with plans to keep it as a pet, but the idea engenders all sorts of obstacles.

When Timmy and Boomer discover there will be girls at the Halloween party they are looking forward to, they go out hunting for foxfire to smear on their faces so girls won't kiss them and are trapped in an abandoned house.

Paul's expensive new sow ""Our Gal"" turns out to have an unfortunate predeliction zfor running away, even through reinforced fencing, and after she has a litter of piglets.

Timmy's plan to help his new friend Henry, who is afraid of dogs, backfires when Henry mistakes Lassie's extra attention as love for him and believes she wants to stay with him.

On a bird-watching expedition for school, Timmy sees a rare snowy egret, but no one will believe him. Finally a professor is dispatched to see if his report is true.

After bow hunters shoot a bear cub, then leave it in the forest to die, the Martins try to save the animal.

Boomer is jealous when Timmy seems to prefer the company of his English visitor, Robin, and his little Cairn terrier Basil, so he and a classmate make fun of Robin's short pants and school tie

Having seen sugar maples while taking Timmy on a nature hike, Uncle Petrie returns to the woods to investigate--and runs into two men holding bank president Robert Hanson hostage. Remembering that he taught Timmy smoke signals on their hike, he makes a desperate gamble while helping one of the criminals make a fire.

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

Several days before Christmas, Lassie is struck by a truck while saving a three-year-old girl and so seriously injured she needs a special veterinarian to operate on her

Timmy and Boomer want to be partners in a business, and, learning Paul is planning to spend $10 on ladybugs to help fight aphids in his apple orchard, are determined to find a cache of them Lassie discovered earlier. But the collie wants nothing to do with the itchy pests

The Army is conducting war games near the farm, and excited Timmy, Boomer, and their friends plan their own maneuvers. But it's no game when scout Timmy and his ""war dog"" Lassie wander into a live mine field!

Ruth, taking a woods shortcut on her way to a Grange supper and having to replace a flat tire, is caught in a trap set by a state hunter to catch a marauding cougar.

For a club project, Timmy and Boomer adopt a tree that was supposedly planted by Johnny Appleseed, then discover it is sleighted to be cut down to make way for a highway, so Timmy writes a letter to the President of the United States.

When Lassie keeps coming home with greasy muck on her legs, Timmy and Boomer investigate, and discover a pool of oil on their property. But Uncle Petrie's investigation of the pool proves to be his undoing.

Asa Winkler, a conniving handyman, claims Lassie bit him and tore his pants to obtain odd jobs at the Martins--and arranges other ""accidents"" to stay on.

A breeder says Lassie may be descended from a famous show dog and urges Timmy not to let her run wild, so she must sit on the sidelines while Boomer's terrier Mike has all the fun.

Timmy, disappointed that there are no contests in the county fair a small boy can participate in, enters his burro Lucky in a farm horse event.

The Martins adopt a cat they find half-drowned outside the house, but the conniving cat, dubbed ""Marmalade"" by Timmy because of his color, immediately starts getting Lassie into trouble.

Knowing Ruth hasn't had a new hat in four years, Paul buys her a lovely spring hat he discovers she was longing for, but Timmy and Lassie inadvertently ruin it while playing.

Timmy and Boomer are heartbroken when they find out Lassie's puppies are to be sold, so Lassie hides them in an old pen in the woods. But the mischevious babies get free.

The entire family pitches in to help Timmy win in his Cub Scout troop's kite-flying contest, especially after the original kite is lost.

Lassie, staying at a neighbor's house while the family as at the county fair, is blamed for the damage done by Chipper, a chimpanzee being nursed by Mrs. Collins.

Lassie falls in love with Suzy, a canine hand puppet manipulated by a down-on-his-luck ventriloquist.

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

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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.

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.