Timmy finds an injured Lassie after she cleverly escapes from the junk yard of her neglectful owner, Hollerin' Hank Cranforth. But just as Timmy and Lassie become instant friends, Hank returns to claim her, leaving a despondent Timmy.
Hollerin' Hank Cranforth becomes accidentally pinned under a pile of junk yard rubble. Lassie escapes and goes to get Timmy for help, but will it be in time to save Hank?...
Lassie tries to warn the unsuspecting Timmy and Billie that an alligator is loose in the swamp, where they've gone to look for the local legend, ""Ol' Joe,"" the Swamp Thing.
Lassie swims a river to bring a rope to a runaway raft that's carrying Timmy and Geoff towards a treacherous man-made waterfall.
Lassie helps to restore the shattered faith of a ""horse healer"" named Maude Windrunner as she struggles to cure Lassie's friend, the thoroughbred Shadow.
Lassie and Timmy try to save a young boy stuck on the edge of a cliff after Lassie's playful Jack Russell Terrier friend, Mel, moves a pylon and warning tape from the path of a kids bike race.
Only the pre-planned arrival of a famous ballplayer in Hudson Falls prevents Timmy from going to New York when he thinks everyone's forgotten his birthday. But Karen's got some surprises in mind!
Hollerin' Hank secretly steals Lassie away from Timmy, but for what reason? Is it to help Lassie or hurt her?
Even though Lassie led them to it, Lassie strongly disapproves when Geoff and Timmy try to sell a stash of smuggled Cuban cigars buried in crypt, instead of turning it in.
Lassie leads Karen to a fawn left motherless by a hunter while Doc Stewart instructs Timmy in proper hunting safety over mom's objections. But with his prey in his sites, Timmy's enthusiasm for hunting is challenged... does he really want to pull the trigger?
Timmy and Lassie develop a clever act to convince Geoff's father (Jay Mark) and Ethan to stop a silly feud between the two men.
Timmy chooses Lassie, Natalie Big Bob, (among others) as subjects for a school assignment on ""A Day In the Life"" of someone important to him.
A litter of lost kittens serve as the focus for both Timmy and Doc Stewart, as they learn to let go of elements from their pasts.
Lassie knows all along that Mel has been stealing everyone's sneakers in order to get some attention, but it takes Timmy and Geoff's sleuthing to make everyone aware of it.
Lassie can't help Timmy fight his battles with Oliver, a misunderstood school bully. And though she disapproves of Ethan's boxing lessons, Karen realizes that Timmy has to learn to defend himself, which he does, but not in the usual way.
Karen and Ethan are about to leave for a veterinarian association dinner where Karen is scheduled to give an important speech when Timmy gets food poisoning and a horse needs immediate emergency aid.
When all the town's dogs mysteriously fall sick, Ethan's uncle Roy is falsely accused of poisoning them. Lassie must solve the mystery and save both Roy and the other dogs.
When Ethan offers to take Timmy to The Hudson Falls Booster Association's Father and Son night, Karen and Timmy have a heart to heart about the absence of his late dad in their lives. Lassie's wisdom convinces the boy that his life must go on.
When Timmy and Natalie team up on a science project, everyone teases them about being an ""item"". Timmy must choose between his reputation and friendship.
Timmy's diplomacy and friendships are put to the test when he becomes the director of the school play.
When Lassie digs up a buried artifact, Timmy saves a Native American burial ground from destruction.
When kids join the search for an escaped emu, Timmy and LAssie get trapped inside an abandoned mine. While all the town mounts a search for the boy, Lassie tries to escape from the mine to get help.
Lassie resumes her quest to save Timmy, who has been trapped in an abandoned mineshaft.
Lassie and Mel are stranded in the big city where they must fend for themselves while finding their way home to Hudson Falls.
Lassie is identified as the nasty collie that has been terrorizing a local farmer's livestock.
Lassie must solve the mystery of a series of UFO sightings over Hudson Falls that has the town all a buzz with speculation.