Ruth loves her new refrigerator, but Lassie prefers meals from the old icebox instead--precipitating a battle of wills.

Timmy buys an old plowhorse for a dollar, but Paul says they cannot keep the animal since he can't do any work. In trying earn money to keep the horse, Timmy becomes trapped in a mine.

Timmy enters a ""why I love my pet"" contest and entrusts Lassie to get the entry to the mailman on time, but she spends so much time aiding neighbors in trouble that the letter is not delivered.

Baseball great Roy Campanella comes to coach the Calverton Boys' League just as Timmy puts in a bid for Lassie to become the team's mascot. But when Timmy overhears two boys bargaining over who will pitch the first game and is threatened that Lassie will not get the mascot position if he tells, he's thrown in a quandary.

A down-on-his-luck horse racer who needs to win just one more race to start his own farm boards his two harness horses, Big Boy, his future stud horse, and Lazy Joe, Big Boy's stablemate, at the Martin farm. But at an early time-trial, Big Boy turns up lame.

After Timmy gets a ""real shiner"" in a fight, Ruth can't understand the self-respect he's gained with his larger classmates and forbids him to play football with them.

As the smallest in the group, Timmy chosen to be test pilot for the gang's homemade glider. But the test flight will be held over a cliff.

On a windy night, Lassie hears screaming coming from the woods, and upon investigating, finds a foreign girl named Anna wandering about lost. Befriending the girl, Lassie brings her home to the Martins. They discover she is a European girl that the Wilkins family has taken in temporarily. She is enrolled in the Calverton school and Timmy begins acclimating her to the area by taking her on a picnic. He notices she always eats as if she is starving; at first he does not notice that she is also hoarding food. Anna is continually coming in late, and then Miss Hazlit begins having complaints from Rudy that things are disappearing from the childrens' lunch boxes. When Rudy accuses Anna in front of the other kids, Timmy fights with him until Miss Hazlit breaks it up and makes Rudy apologize. Timmy comes home, however, and overhears Miss Hazlit telling Ruth that she also suspects that Anna is the thief. Timmy is disturbed, but agrees to let Miss Hazlit take care of the matter. In the meantime,

Paul needs a new well, and Cully Wilson swears he can find water with a divining rod rather than Paul hiring an expensive geologist.

Ruth is disturbed by the tall tales Timmy is telling to impress Willy Brewster--a problem compounded when he tells Willy and Flip that Mrs. Larson, a new neighbor living in a run-down house, is a witch.

Due to stock killings by a puma nicknamed ""Satan,"" the local farmers hire a bounty hunter, a curt, unlikable man whose tracking dog King and Lassie immediately strike sparks off one another.

After Paul refuses to consider selling his land to a real estate broker, someone ruins his tomato crop and sets fire to his hay.

When Timmy sees a meteorite come down, he's sure it was really a spaceship from another planet--and that a man from Mars is wandering around the farm. Funny thing is: food keeps disappearing from the Martin house!

After a local farmer dies on the way to the Capitol City hospital, fifty miles away, the Martins spearhead a plan to start a community hospital, but a prominent farmer known as a skinflint refuses his approval.

Timmy persuades editor Ira Caldwell to let him try and earn money by selling newspaper subscriptions to the Calverton Sentinel,and then accidently overhears a plan to rob the local dairy's co-op while at the Vance farm.

During a game, the boys begin fighting and Flip is knocked out by a rock thrown by Rudy, who makes Timmy and Sam believe Flip is dead and it's their fault, so the two boys and Lassie run away to avoid disgracing their families.

Phil Houston's stockyards suddenly gets a new source of lambs for market thanks to his assistant Joe Morton and Lassie seems to be reacting to strange noises not coming from the new silent dog whistle Timmy recently purchased.

When Timmy and Don accidentally release the guinea pig from an experimental rocket, they replace it with Timmy's guinea pig Alexander the Great. But authorities suspect the guinea pig on the rocket was exposed to deadly radiation.

large mongrel dog who's been a nuisance on neighbors' farms is trapped in a gorge, and although most of the farmers want the stray dead, the Calverton dog pound representative wants to save him.

Timmy, studying grasshoppers for a school project, becomes so worried about a possible plague when he sees a big nest of the insects that he speaks up at the Grange meeting and tries to buy insecticide with his own money. It's only then that even Paul takes him seriously--and is glad he did.

After he trades some old sports equipment for a homing pigeon, Timmy's next task is to train her. But only Lassie--and a male pigeon attracted to the new homer--knows ""Bright Eyes"" is endangered by a hawk on her first long-distance flight.

After an Explorer lectures Timmy's Cub Scout den, the inspired den goes on a hike and wonder into the Badlands where they become stranded on a rock ledge.

When Paul tends a neighbor's herd, he discovers they have hoof-and-mouth disease--and now Princess, the new purebred cow he invested $1000 in, and the Martin's old cow Bessie are threatened with slaughter.

A neighbor may lose his new means of moneymaking when minks from his mink farm are blamed for slaughtering chickens. But the killer turns out to be something more dangerous: a wolverine.

The father of a new girl Timmy befriends owns the land Paul is renting for his alfalfa crop--and plans to flood the field before Paul can harvest it.