Amy and Lou Fleming, and their grandfather Jack, deal with life after their mother's death while a new ranch hand, Ty Borden, comes to live and work at Heartland.

Lou sends an uncured horse back to its owner, which causes friction with Amy. Ty builds Amy a jumping ring and Jack decides to keep Ty on at Heartland.

As the family struggles to deal with Tim’s news, Lou throws herself into planning her high school reunion to impress an old rival. Meanwhile, Amy tries to stay focused as Georgie comes up against an unexpected challenge while beginning to train with Phoenix. And Jack fights to control his own emotions as Mitch pressures him to discuss the future of the cattle business with Tim.

Ben Stillman arrives at Heartland and his treatment of his horse Red angers everyone. Ashley lures Ty to Briar Ridge with a job offer.

When Hollywood comes to Heartland, Amy is so starstruck, she loses track of what's really important in her life.

High profile horse breeder Lisa Stillman asks Amy to help her with her horse, Promise. Lou holds a Heartland Open House to help bring in business.

Lou's boyfriend Carl arrives at Heartland with a couple of different proposals for Lou. His welcome, however, is both hot and cold.

When Ty comes back to Heartland, he quickly realizes that profound changes have occurred in his absence. Caleb, the new ranch hand, seems to have taken over both his job and his place in Amy's heart.

Amy finds herself caught in the middle of a family crisis when she tries to help a girl and her horse recover from what appears to be a freak accident.

When an irate Grant, Ty's travel buddy shows up at Heartland to punch out Ty for "kissing Blair" the disclosure puts Ty and Amy's relationship in jeopardy. Meanwhile finding out that their marriage was not legal puts Caleb and Ashley into a turmoil. All the relationship drama makes Lou question her marriage with Peter.

Amy is roped into helping Tim project a positive image to the community, in hopes it will further his custody case for Shane.

Tim is trying to convince Jack to be his partner in the purchase of a bison bull when Miranda comes to Heartland for a visit and goes on a trail ride with Tim that could totally change their family dynamic.

Amy returns from Europe but finds herself struggling to integrate back into life at Heartland and her relationship with Ty.

Ty struggles with control issues when his mom stops by for an unexpected visit hoping to bond with her granddaughter, and Amy is forced to mediate.

Amy helps Lisa with Platinum Bow. Tim has a difficult visit with Shane. Katie leads a strike at Maggie's. Jack reconnects with his country music roots.

Amy must deal with Lyndy's sudden fear of horses. Logan blames himself for Miley's accident. Tim enlists the family to make Shane's return to Heartland perfect, while Katie struggles with a friendship.

Lou decides to make a promotional video for Heartland. Ty's new job at Briar Ridge isn't going as planned. Scott gets Amy to help with a wild pony.

Tim's visit to Heartland causes sibling rivalry between Lou and Amy. Jack takes Lisa Stillman fishing on their second date.

Lou is forced to reconsider her choice to live and work at Heartland when her former New York colleagues arrive for a weekend equine retreat. Amy is unsure whether she can trust Ty.

Out for a ride along the river, Amy comes across an RCMP officer desperately trying to save a young boy from drowning. Scott misinterprets Nick Harwell's polo match invitation to Lou as a date. Mallory seeks Jack's advice on how to deal with her love life.

Lisa meddles in Lou's business and personal life with disastrous results. Lisa brings a "cursed" horse for Amy to treat. The beautiful Andalusian named Diva Girl has been returned to Lisa by multiple owners.

Lou goes head to head with Big Alberta Oil when seismic surveyors force their way onto Heartland.

Clint brings two tough kids on probation to Heartland forcing Ty to deal with a part of his past he'd rather forget.

In the hopes of impressing Ashley, Caleb takes lessons in bulldogging from former rodeo champion Tim, who stubbornly refuses to acknowledge that he may no longer have what it takes. Kit and Ty sort out their lingering break-up issues as Ty assists Scott with the delivery of Kit's mare's foal. Lou invites Peter to manage his business from the Heartland facilities while his office undergoes renovation, and lives to regret it.

Ty and Amy clash over how best to raise an orphaned foal. Lou must defuse a potential lawsuit after fending off unwanted advances from an unscrupulous business client. Meanwhile, Val tries to connect with her newly-reconciled daughter Ashley and a cougar stalks the Heartland area.