Lou throws herself into planning her high school reunion to impress her old rival. Amy tries to stay focused as Georgie comes up against an unexpected challenge while beginning training with Phoenix.
Tim rallies the family together for a memorial ride on the tenth anniversary of Marion's death. Jade is offered a scholarship at a school in Texas.
Tim is forced to examine his feelings for Casey. Amy works with a former racehorse in need of a new owner. Jack steps out of his comfort zone to support Lisa. Wyatt returns with a warning for Georgie.
Amy and Tim arrive in Mongolia but find out that Ty is in danger. Georgie's confidence is rattled by Val right before her upcoming competition.
Georgie has a difficult decision to make regarding her equine skills. New parents Amy and Ty try to maintain a social life. Mitch confides in Jack about his move to Calgary.
The accidental death of Georgie's real parents comes to a head when her brother sends her a newspaper article.
Ty struggles when his mom makes an unexpected visit in hopes of bonding with her granddaughter.
With Caleb and Cassandra's wedding as well as the birth of Amy and Ty's baby on the horizon, everyone is rushing to make sure both events go down without a hitch.
The family rallies around Amy to support her while Ty is admitted to the hospital after returning from Mongolia. Georgie helps Olivia save her horse from being put down.
A secret from Jack's past threatens to change his relationship with the family forever.
Amy struggles with the feeling that something is not right with Ty when she and Jack strive to help Ghost, a wild horse linked with Ty's past. Georgie goes on a fun date with Clay's cousin.
Jake's unexpected arrival prompts Mallory to reveal why she really came to Heartland. Georgie helps Amy with an under-performing cutting horse.
Amy helps a mounted archer reconnect with her horse. Meanwhile, Georgie's relationship is tested when Adam finds her spending time with another guy.
Tim's team-building mounted orienteering event turns competitive. Amy and Cass have a falling out over Ty's partnership at the clinic but a close call forces them to reconcile. Lisa's uppity Aunt Evelyn visits.
The family must deal with Amy and Ty's decision about their future. Georgie and Jade convince Tim to hire them on at Maggie's. Amy and Ty help Casey's horse who stopped eating.
Tim is caught in the middle of a showdown with a new hotshot bronc rider. Georgie is feeling trapped in a rivalry of her own. Amy and Jack work with a top-flight bronc that has lost his mojo.
Ty has to perform surgery. Amy and Georgie take care of the new foals. Lou and Mitch deal with their attraction towards each other.
Amy and Ty work to resolve a dangerous pregnancy issue. Georgie's Extreme Team practices start back up. Tim confronts Mitch. Lou makes a decision about a new business venture.
After their plans for a romantic getaway fall apart, Ty and Amy celebrate their first wedding anniversary at home, where Amy reveals some happy news.
Amy helps Cass wrangle a spirited horse, but there's more to the problem than they initially realize. Tim insists that everyone attend a holiday party.