Amy struggles to integrate back into life at Heartland when she returns from Europe and everything including her relationship with Ty is different.

After her initial shock at her grandfather's announcement, Lou throws herself into party planning mode and forces Jack into an awkward reunion with an old acquaintance. Ty becomes the middleman when Amy and Caleb butt heads over horse training. And still reeling from her recent discovery, Georgie pulls away from Amy and focuses on donating money to an online animal sanctuary.

Lavish gifts from afar put more distance between Amy and Georgie.

A surprise visitor at Heartland makes an unwelcome declaration and Amy is forced to deal with the devastating consequences. Meanwhile, a dire animal crisis at the Reserve eerily parallels Ty's personal life when he realizes that some things just can't be saved. Still stinging from Katie's pre-school rejection, Lou's insistence that a specialist test her daughter brings an unexpected result. And Georgie realizes she needs her own trick riding horse in order to keep up with her nemesis Olivia.

Amy struggles to turn a pair of horses into a team, and is forced to go head-to-head with a rival trainer. Meanwhile, Ty discovers a dead bear on the Reserve with its gallbladder missing but when he begins asking too many questions, poachers threaten his life. When Ty asks Georgie to care for an orphan wolf pup, she sees it as an opportunity to reunite Amy and Ty. And Lou hires Jade to work at the Dude Ranch but quickly regrets her decision when the unpredictable teen proves to be a problem employee who takes advantage of the situation.

Amy blames Georgie and Jade when a clients horse keeps escaping. She then re-evaluates things when she learns the horse has hidden skills.

Amy struggles to help a Hutterite family whose team of Percherons ran amok hayride. But Georgie forms a strong bond with the young Hutterite daughter who turns out to be the key to unraveling the mystery. While Tim admittedly had a fantastic time traveling the rodeo circuit with Casey, he returns to Heartland and begins to second-guess their burgeoning relationship. Meanwhile, back at the clinic, a significant vet victory for Ty proves to be a bittersweet triumph when he realizes that all he wants to do - is share the experience with Amy. And Jack is forced to confront his traditional ideals when Lisa informs him that she has no intention of taking his name.

A school project opens a door to Georgie's past that could ultimately change her life at Heartland. Meanwhile, Casey expresses interest in buying one of Ty and Caleb's bulldogging horses and Caleb enlists Amy's help to train it in order to secure the deal. Then, while celebrating their first big sale, Ty tells Caleb that he wants to officially pull out of their business partnership, which results in Caleb forging an unlikely alliance. And Tim is forced to come clean about his senior rodeo circuit dreams when he learns that Casey is buying a bulldogging horse for him. Featuring guest star Keegan Connor Tracy.

A threat of a cull looms over a herd of wild horses, so Jack and Amy go to help a old friend.

Amy and Ty find themselves drawing closer as they make a desperate bid to save the wild horses.

A client reveals that Peter turned down a job offer, leaving Amy in a difficult position.

When Amy is invited to do a horse clinic in Montana, she and Ty decide to take a road trip together, but an unexpected encounter derails their plans. Meanwhile, back at Heartland, Jack and Lisa feel caught in the middle when Lou confronts Peter over his lie of omission, and his decision to choose his career in Vancouver over a job offer in Calgary which would give him a chance to spend more time with his family. And with both Ty and Scott out of town, Georgie and Jade volunteer at the vet clinic.

Tim opens a rodeo school, determined to help young people avoid injury while getting the training they need, but is immediately confronted with a problem student. Meanwhile, Ty jumps to conclusions when he learns Lily has entered rehab again, blaming his stepfather, Wade, for his mother's relapse. And with Lou out of town, Georgie prepares to attend her first Sadie Hawkins dance. Then, despite Jack's protestations that she not get involved, Lisa spearheads wedding preparations with a reluctant Amy.

Amy and Ty help Scott's nephew realize he is worthy of continuing his family tradition of relay racing.

Lou returns from Vancouver with an admission that threatens to change the Heartland family forever.

After Georgie receives devastating news from Lou and Peter, the family attempts to support her.

Lou spearheads preparations for the big day while Amy throws herself into gentling a rescue horse in order to avoid all the craziness.

Lou deals with last minute obstacles in an attempt to give Amy and Ty the perfect wedding.