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.

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.

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.

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

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

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.

Amy tries to pretend that nothing has changed when Ty returns to Heartland with a surprise guest.

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 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.

Ty is torn between his past and his family at Heartland when an old friend asks him for help.

Since her accident, Amy's client list has dwindled to nearly nothing, so she holds a comeback clinic to restart her career.

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 and Jack retrain Edwin's horse for carriage racing, bringing Amy and Edwin closer. Logan takes on his first client horse. Election night arrives for Lou just as the family faces a difficult loss.

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.

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

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.