After Will enters an abandoned house on a dare, someone sets the place on fire.

A loose electrical wire turns a metal fence by Will's baseball field into a high-voltage hazard.

Will, Lassie, a local merchant and a rattlesnake are trapped in the man's shop.

When burglars strike the McCulloch house, Lassie runs off to sound the alarm.

Will, Megan and Lassie play ball at Chris's latest construction site---a field scattered with live artillery shells.

Lassie unearths a clay pot that indicates the presence of an ancient burial ground.

An old photo sends the McCullochs to a ghost town on a quest for treasure---but a modern-day outlaw is hiding there too.

When Uncle Steve takes Will and Megan gliding, they learn that hanging out with him can be dangerous.

Megan helps the victim of a motorcycle accident, unaware that the crash has broken a gas line.

Will accepts a challenge to tackle a maze set up by a practical joker (Chris Demetral), unaware of the danger that lies ahead.

After receiving a troubling phone call, Dee heads for the lake, where a storm traps her and Lassie in an old cabin.

Andrew Leeds, an unexpected houseguest (Roddy McDowall) who dislikes children and animals upsets Dee and Will, until they discover who he really is.

Will joins his friend Arnie (Josh C. Williams) in a prank that closes school for the day, freeing the boys to get into more trouble.

Shepard, a mysterious magician (Tony Jay) fails to impress Megan until his performance at a benefit show.

An autistic boy (Gregor Hesse) finds a friend in Lassie.

A councilwoman (Patricia McCormack) tries to ban a horse from the neighborhood, so Lassie and the kids dig into the case.

June Lockhart of the original series appears as the collie's former owner, who comes looking for her pet and finds her long-lost son.

Wayne, Will's friend (Gabriel Damon) is determined to play a trick on a neighbor the night before Halloween.

Lassie is about to give birth to puppies, and Will decides to sell one to raise money for a new racing bike.

When Megan becomes ill after swimming in a polluted lake, Chris sets out to find the source of the contamination.

Lassie is trapped in a hot car while Will is trying to impress the coach---and a young lady (Katie Jane Johnston.)

Lassie brings a stray dog home, who are surprised when two different owners come to claim the pet.

Lassie is stranded in the city, but she meets Mike, a boy who shares her same problem.

Uncle Steve is all by himself in the hills and seriously wounded by an irresponsible hunter. Lassie is ready to come to the rescue, but first she must deal with a bum rap that lands her in the custody of the overzealous dogcatcher.