Corey shows an old friend why a buffalo hunt will improve the quality of life in a herd while Lassie helps a perpetually straying calf get back to its mother, who is sleighted to be killed.

While inspecting a ski area with the careless proprietor, Corey and Lassie find major infractions, but trouble is only starting when they are trapped at the top of a stalled ski lift with the now injured man.

In the Franklin National Forest, a wetlands sanctuary, Lassie saves a Canada goose who was trapped in a fishing line and then attacked by bobcat, injuring her wing.

Corey leaves Lassie with Ed, a novice smoke jumper injured in a fire, when he participates in a smoke jump. When Corey and his friend Lane, a veteran fire fighter, are trapped and Ed has the idea to send Lassie, with a transmitter, in to find them.

When Corey devises a way to free a female bear from the pit trap she has been caught in, the animal ""repays"" him by attacking him and knocking him into the same pit.

While trying to find Corey, on duty in the thick of a hurricane, Lassie is trapped on a freighter which sails with her aboard.

Lassie, finally escaped from the freighter, swims ashore and assists an injured lighthouse keeper.

Lassie is put on trial for being a stray in Williamsburg, Virginia, and is defended by an elderly lawyer.

Lassie helps a lonely teenage mountain girl who attempts to protect her pet fox Riddle from a neighbor's boy and his hounds.

Lassie,continuing on his voyage, comes up on and helps an abandoned kitten.

Lassie joins two runaway boys who are rafting down the river to New Orleans; when their raft is lost, they decide to spend the night in a cave.

Unbeknownst to Corey, who is assigned a project in New Orleans, Lassie has also reached the cresent city.They end up just missing each other several times before finally meeting up again.

Dan Casey's hope of winning the trotting races at the Franklin County Fair with his pony Little Jim is dashed when he is hurt in a fall from the sulky--until his granddaughter Maureen resolves to drive in his place.

Corey and Lassie stop to help young Johnny Conrad on their way to supervise the cutting of the national Christmas tree--but Johnny is heartbroken when he discovers the chosen spruce is ""the meeting tree"" his father, who is missing in action in Vietnam, and he used while on fishing and hunting trips.

Corey and Lassie tame a wild stallion that was injured in a fall down a ridge and who will always be a little lame.

Lassie is trying to defend a cougar cub from a vicious attack from a wolf.When she accidently slips and falls down the cliff and is hurt.But Lassie's good deed is repayed when the cougar cub's mother,cares for Lassie and nurses her back to health.

While surveying the badlands of North Dakota,for use as a wilderness area, Corey is bitten by a rattlesnake; when his horse returns riderless to the corral, a fellow ranger and a pilot set up a desperate search for him.

After Corey and a fellow ranger put up a trash display to remind tourists to clean up their litter, Lassie finds a well-meaning man tossing trash into a ravine--and after he leaves, a raccoon gets his head caught in a can the man left.

Lassie helps an aging bighorn sheep who has been trapped and is helpless before a pack of wild dogs.

In this,another of the classic Lassie all-animal episodes, Lassie and an eagle protect a helpless mother owl who was injured by a possum trying to steal her eggs. The eagle hatches the eggs and then feeds the chicks as the owl recovers and Lassie protects the nest.

When the rangers have an area cleared for a vista stop, several wrecked cars must be towed away from the site. But a squirrel is trapped in the trunk of one of the vehicles and only Lassie knows it.

Luther Jennings, the elderly ranger manning the survey tower at Strawberry Peak, takes it hard when he finds he'll lose his job when the tower is slated for destruction. Then he's attacked by a jaguar while out on a walk.

While Corey helps the town of Whitehorse Falls with modern forestry methods, Lassie has her hands--uh, paws--full with a mischievous kitten who can't seem to help endangering himself.

A coyote rescued and tamed by a fellow forest ranger and now returning to the wild again is stalked by a hunter, but Lassie and ""Monday's"" mate try to outwit the man.

It's fire season in the Franklin National Forest and when a reporter interviews Corey about fire safety, he finds out most fires are caused by children playing with matches. Sure enough, Lassie soon finds a boy playing with matches who finally ends up setting a fire which she strives to put out.