- 1
The Runt
All of Lassie's pups have been given away except for Laddie, the runt, and she hides him in an abandoned mineshaft to keep him with her.
- 2
The Pit
When Jeff and Porky see pit bull terriers, Gramps suspects illegal dogfights are being held in the area.
- 3
The Kittens
Jeff and Lassie find a litter of abandoned kittens and are horrified when Gramps says to leave them alone; that they can't be saved and will probably starve.
- 4
The Dog Show
Porky enters Lassie in the Capitol City Dog Show obedience trials without knowing what the procedure is, but Jeff finds out what's involved and trains her.
- 5
The School
A new teacher has forbidden the children from bringing dogs into the classroom and one of Jeff's classmates is determined to do something about it.
- 6
The Violin
Jeff teaches Lassie to howl when he plays the violin, hoping to get out of lessons, but Ellen sees through the scheme
- 7
The Monster
There is a weird ""monster"" in the lake making unearthly noises--but it turns out to be a displaced seal, which Jeff promptly tries to adopt.
- 8
The Witch
Lassie comes down with an odd ailment. The kids are convinced that a creepy old lady they call the "witch woman" has cast a spell on the dog.
- 9
The Wild Duck
Jeff nurses a wild duck back to health but when he releases it back to the wild, he fears the duck may be the victim of poachers in the area.
- 10
The Rival
Jeff and Gramps are jealous when Clay Horton takes Ellen out on a date.
- 11
The Newspaper
The boys start printing a newspaper to make themselves some pocket money--but the material they print gets them into hot water instead.
- 12
The Clown
After an itinerant clown and his dog entertain at a church carnival, the man is accused of robbing a neighbor.
- 13
The Twister
The Millers batten down the hatches as a severe storm approaches.
- 14
Gramps' Birthday
Jeff and Ellen plan a surprise party for Gramps so well that Gramps feels neglected on his birthday and ""runs away.""
- 15
The Gypsies
A gypsy girl and her family camp on the Miller farm, despite neighbors' reports of thievery.
- 16
The Gift
A television set meant for the Brockways is delivered to the Millers.
- 17
The Stamp Album
In a quest for a valuable stamp, the boys begin quarreling with each other.
- 18
The Dog Catcher
When Lassie is impounded in Capitol City for lack of tag and leash, Jeff learns that most of the dogs in the pound are to be killed so he brings, much to the consternation of Ellen, the dogs to the farm so he can find them homes.
- 19
Pokey
Matt Brockway says Pokey is useless and tells Porky he is going to give the dog away.
- 20
The Trial
When Gramps refuses to sell the farm to nasty Emmet Carey, Edgar Carey pretends that a barbed wire scratch he got in the barn is Lassie's bite, figuring the Millers will give up the farm before giving up Lassie
- 21
The Hawk
Jeff and Porky horrify Gramps by trying to tame a red-tailed hawk as a hunting falcon.
- 22
The Tree House
The boys quarrel over Pokey being able to sleep in their new tree house.
- 23
The Visitor
The Millers welcome a Japanese exchange student--and run into bigotry from a neighbor who has never gotten over World War II.
- 24
The Raft
The boys' journey on their new raft is hampered by the fact that Porky can't swim.
- 25
The Journey
When Gramps and Ellen tell him that Lassie is going blind, Jeff takes the dog on a long journey to find the doctor that can restore her sight.
- 26
The Vet
Jeff decides he wants to be a veterinarian, and his first patient is the Miller cow.
- 27
Lassie's Double
Ellen accidentally brings home a valuable champion collie from a dog show rather than Lassie--and is accused of theft!
- 28
The Child
Jeff and Porky, told to babysit little Janie, leave the child with Lassie while they run to see construction equipment at work, not knowing Janie is following them.
- 29
The Leash
After a friend's mother is involved in a serious car accident, Jeff becomes over protective of Lassie.
- 30
Sunday School
Jeff, in charge of collecting money for Sunday School, loses the contributions and has no way of replacing them.
- 31
The Deer Hunter
Jeff discovers that a new classmate's father is jacklighting deer.
- 32
Domino
A disreputable horse dealer schemes to buy Jeff's colt cheaply by proving to Gramps that the horse is vicious.
- 33
The Marauder
One of Lassie's puppies, Comet, mistreated by its owner, has turned wild.
- 34
The Calf
Jeff and Porky enter the world of business when they take a 4-H calf home from the county's fair, intent on raising it to sell for the price of an outboard motor. In their care, the calf grows into a prize-winning heifer.
- 35
The Crop Duster
Gramps' blames Lassie's son Laddie's illness on the spray used by a local crop duster.
- 36
War Dog
Jeff persuades a neighbor to buy a rehabilitated war dog, only to have the dog exhibit aggressive behavior. Joe Brown: James Griffith.
- 37
The Haircut
Ellen battles with Jeff to go get a haircut--until the unexpected happens.
- 38
Diane
Jeff and Porky quarrel over a new girl in town, who is happily playing one boy off another!
- 39
The Frog
When Jeff and Porky discover their competition jumping frog is female and about to lay eggs, they drive Gramps and Ellen to exhaustion in their quest to see the eggs are fertilized and produce offspring.