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.
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.
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 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.
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.
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.
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 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?
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.
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!
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.
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 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.
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?...
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.