Amy puts together a rescue team to find Ty and Scott, who have gone missing in a mountain area.
The boys go on a fishing trip while the girls must deal with chaos caused by a dog, a porcupine and a herd of escaped cows back at Heartland.
Victor Whitetail visits Heartland, which brings back up the past as well as making Tim wonder if Victor and his ex-wife were more than just friends.
When a dangerous horse virus called Strangles puts Heartland under quarantine relationships are put to the test and Pegasus becomes very ill.
Amy and Ty are at odds over his purchase of a vintage motorcycle while Caleb goes off to a rodeo in Montana despite Ashley's growing concerns about his life on the circuit.
Amy faces a tough moral dilemma when she discovers Mr. Hanley has abandoned his horses and is on the brink of losing his farm.
Caleb struggles to get over the physical and emotional scars from his terrible accident as Amy tries to get him back on a horse and Tim doles out some tough love.
When Amy follows in her mothers footsteps and enters a professional colt starting competition her gift with horses, and self-confidence, is put to the test.
A surprise announcement by Peter throws Lous wedding plans into disarray while Amy and Ty are forced to make difficult decisions about their futures.
Amy tries to pretend that nothing has changed when Ty returns to Heartland with a surprise guest.
Amy scratches the surface to discover Nick Harwell's problems with his polo ponies. Lou's life in Dubai and Tims relationship with his jockey are not what they appear to be.
When an unspoken attraction re-surfaces, Amy discovers that honesty might be the best policy, but it certainly isn't the easiest one.
A looming high school graduation and Spartans near fatal bout with colic force Amy to face where her future really lies.
When Amy and Ty convince Sarah, the town recluse, to let them treat her sick horse at Heartland, the family helps her face the ghosts of her past.
Tim enlists Amy to ride Lightning Dexter in a big time stakes race when he finds out his girlfriend, Janice has teamed up with the competition.
Amy and Kit have to put their differences beside them when they take on Caleb in a team-roping jackpot.
When Amy is hired to do a horse clinic with a group of inmates, Ty is surprised to discover that one of them is a friend from hid bad old days at the group home.
When Ty and Amy find her father's stolen cattle, Tim convinces the family they need to take the law into their own hands.
Caleb and Ashley have difficulty adjusting to the reality that they aren't legally married.
Amy fights to keep Dexter in the family when she learns Tim is putting the horse up for sale in a claiming race.
Jack is forced to revisit a rough patch in his marriage when he finds an unfinished song by Lyndy in her old guitar case.
Ty has some tough decisions to make when Jack leaves him literally at a crossroads.
Amy must deal with Stewart Forrest's unrealistic expectations, when she works with his daughter and an elite jumper that may be too much horse for the girl to handle.
Lou help's Amy fight Stewart Forrest's bitter lawsuit to help save her sister's reputation and the family business.
When Bryce, a paralyzed military vet and ex-rodeo cowboy, hires Amy to help sell his roping horse she sees an opportunity to re-train both horse and rider.
A horse crazy young boy comes to Heartland and quickly bonds with Amy, but his mother has a secret that could change everything for the Fleming family.
Amy and Ty work through their trust issues as they train a pair of Clydsedales, but its an emergency at Heartland that reveals their true strength as a team when it matters most.
When Amy’s dog Lobo is injured by a trigger-happy rancher, it’s up to Ty to save his life, meanwhile good old jack has gone to moosejaw to persuade miranda to come back to heartland to sort out tim's struggle and Mallory tries to raise money to help her get an apartment so she will not have to move to Nashville.
When a mystery horse arrives at Heartland, Amy and Ty are sent down a path that will alter their lives. Ty is going to ask Amy to marry him.