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24 Episodes 1972 - 1973
Episode 1
Sun, Sep 17, 197230 mins
Ron reads a letter to the boys that Garth will remain a VISTA volunteer and his brother Keith will take charge of the ranch. This upsets the boys and Mikey takes off with Lassie. A storm related fire endangers Lassie but Keith proves himself.
Episode 2
Sun, Sep 24, 197230 mins
Lassie and Lucy eagerly anticipate the return of the doves to the local mission. While waiting they wander the town, greeting people and then help the gardener Johann. A hawk threatens the first dove they see.
Episode 3
Sun, Oct 1, 197230 mins
A storm knocks down a fence allowing a foal to wander off and injuring the mother. Lassie and Lucy leave on horseback to search for the colt followed by Ron and Dale. A tumble into a river endangers the young animal.
Episode 4
Sun, Oct 15, 197230 mins
Crows are marauding the corn and Lassie can't fend them off herself. The boys create a scarecrow but the birds aren't impressed. One steals Mike's $3 and he falls into a water storage tower trying to get it back. Lassie must rescue him.
Episode 5
Sat, Oct 21, 197230 mins
Lassie finds a hearing impaired boy, who cannot speak, so she lets Keith and Dale know. They bring young Lucy over to communicate with him but he won't identify himself. The boy then finds an injured dog that he bonds with.
Episode 6
Sun, Oct 29, 197230 mins
The mystery boy turns out to be Tommy, who is a runaway from an orphanage because Father Lavery is being transferred. The injured dog is a police dog identified by two officers who want to help. Lucy gets Tommy to open up.
Episode 7
Sat, Nov 4, 197230 mins
Lassie is exploring the seashore when she encounters three kittens left in a cage. They get released but Lassie must fight off a mean dog and then keep the kittens safe from the incoming tide.
Episode 8
Sat, Nov 11, 197230 mins
Out exploring Lassie encounters a pair of nesting eagles. When the female injures her wing, Lassie alerts Ron and Keith who try to help. Lassie and her friends devise a way to help feed the chicks without disturbing the male.
Episode 9
Sat, Nov 18, 197230 mins
Lassie befriends a high strung horse Midnight who belongs to Mr. Dobbs, a neighbor to the Holden Ranch. The stallion is being trained to race but a trip to the track ends in a mishap with Lassie on hand to help out.
Episode 10
Sat, Nov 25, 197230 mins
Lassie and Lucy meet Joey, a runaway boy, when she is out riding. Bringing him to the Holden Ranch, he learns from the other boys about cattle and other farm activities. Joey overhears Keith on the phone and takes off again.
Episode 11
Sat, Dec 2, 197230 mins
Because of the misunderstood phone call Joey runs away. After it's discovered Keith, Dale, and Ron start searching for on horseback in the rugged country. With the help of Lassie they discover Joey has fallen into a crevice.
Episode 12
Sat, Dec 9, 197230 mins
The Holdens are afraid Karl will not survive after a heart attack robs his will to live.

Episode 13
Sat, Dec 16, 197230 mins
Dale, Keith, and Lassie encounter Julio, who wants to build his dream house in an area with no water. Willie helps Julio build a well in a likely futile exercise. Dale and Keith want to include the older man as part of the ranch family.

Episode 14
Sat, Jan 6, 197330 mins
While out in her own, Lassie's foot is severely damaged when caught in an illegal trap. She comes under the care of a reclusive Native American healer while Dale and Keith mount a search for their beloved animal friend.

Episode 15
Sat, Jan 13, 1973
Lassie alerts Willy to a dog floating down the stream and together they rescue the stray. At first the dog is fearful of country life but Lassie teaches the little animal which becomes important when a tree traps the collie.

Episode 16
Wed, Jan 24, 197330 mins
Dale's new hobby is building and flying model airplanes so he is determined to retrieve one lost in a remote area. Dale leaves with Lassie and a new horse Midnight but the trip turns disastrous when a rattlesnake startles Dale near a cliff.

Episode 17
Sat, Feb 3, 197330 mins
Dale is severly hurt after tumbling down a cliff with only an injured Lassie by his side. Lassie struggles to make her way to Midnight, hoping the horse will know to head to the ranch and alert Keith to the situation.

Episode 18
Sat, Feb 10, 197330 mins
Lassie's stray dog friend gives birth in the Holden barn. Dale and Keith trail a coyote who takes a puppy into the mountains. They encounter two ranchers hunting coyotes as pests so Lassie teaches everyone a lesson.

Episode 19
Sat, Feb 17, 197330 mins
Two inept crooks Harley and Frank, don't call him Francis, steal Midnight from the Holden ranch. Lassie follows them to a ghost town, leaving enough clues for Keith and Dale to find the horse thieves.

Episode 20
Sun, Feb 25, 197330 mins
Keith accompanies Lucy and Elaine into the city for tests with Lassie going along. Lucy turns out to be a candidate for surgery to restore her hearing but during the operation Lassie wanders off.

Episode 21
Sun, Mar 4, 197330 mins
Lassie, after accompanying Keith to the big city for Lucy's hearing operation, gets lost. Keith looks for her as Lassie wanders the city, taking in a kid's baseball game, the ocean but then enters an army firing range.

Episode 22
Sun, Mar 11, 197330 mins
Lassie continues her journey home, getting a fish hook in her paw before being helped by Jim and his surfer friend. Accepting a ride north with his two new pals he nears the Holden Ranch. Lucy finds out if her hearing operation was a success.

Episode 23
Sun, Mar 18, 197330 mins
Lucy, while hiking with Lassie, meets a traveling young Johnny who has a guitar and a dog Smokey. Her mother agrees to hire the troubled young man temporarily as he learns about life and what's important.

Episode 24
Sun, Mar 25, 197330 mins
Dale and Keith are going to be gone so Lassie heads over to the Baker farm to look in on the newborn calf. It escapes from it's pen and Lassie spends the day keeping the calf safe.