As Amy and Ty prepare for parenthood, they work together to resolve a dangerous pregnancy issue.
Ty performs life-saving surgery on a mare, while Amy and the family work around-the-clock to bottle feed the mare's twin foals.
Tim is caught in the middle of Jade's showdown with a new hotshot bronc rider.
The Heartland family must deal with Amy and Ty's decision about their future.
A team building event turns competitive and Georgie is partnered with Jade's rival.
While helping a mounted archer, Amy reveals the mystery behind Spartan's behavior.
When Lou is given a horse, Amy helps her sister nurture a connection with the animal while Lou wrestles with the implications of the unexpected gift.
Fearing the worst, Jack is shocked to learn the reason for an old friend's unexpected visit to Heartland. Meanwhile, Amy intervenes when the new coach pits Georgie & her teammates against each other.
An out-of-town horse clinic takes a dangerous turn for Amy, Tim, and Georgie.
While Amy deals with a panicked horse trapped in a trailer, Georgie heads off on a desperate search for Tim.
When Georgie unexpectedly struggles with a new challenge, Amy steps in to help her unearth the cause. Then, Amy's worst fears are realized when an eager Tim attends a pregnancy clinic with her. Meanwhile, Jack deals with an upset Katie when Lou's delayed return to Heartland forces him to navigate "back-to-school" prep. Feeling caught in the middle, Amy grapples with keeping a secret when Cass is convinced that Caleb is cheating on her. And Jade is surprised to see a new side of Clay when he stands up for his Aunt Casey.
Tragedy strikes, and Amy and Georgie work together to help Tim's traumatized barrel racing horse. Meanwhile, Jack helps Tim, Casey, and the entire rodeo community pull through a devastating loss. And Jade gets her permit to compete in the pros but quickly gets pulled into the party lifestyle of that world.
When an unexpected guest arrives at Heartland, Amy and Jack question the real reason for the surprise visit. Meanwhile, Lou is upset to learn that her future plans with Mitch may be in jeopardy. Then, a confession by Adam leads Georgie to make a difficult decision. And Jack is caught in the middle when Lou and Lisa both buy the same gift for Amy's baby shower.
Jake's unexpected arrival at Heartland forces Mallory to admit to Amy and Jack the real reason she came back to Heartland. Meanwhile, Georgie tries to move on after her break up with Adam by throwing herself into helping Amy with an underperforming cutting horse which Scott brings to Heartland. And Lou and Mitch struggle to find the right time to tell the family about their relationship.
Amy struggles with the feeling that something is not right with Ty while she and Jack strive to help Ghost, the wild Appaloosa horse which has been closely linked with Ty in the past. Meanwhile, Georgie goes on a fun date with Clay's cousin, Wyatt, which interestingly leads her to a realization about Adam. Also, a concerned Tim steps up when Jade's plans fall through. And Kaitlyn Leeb is back, putting her veterinarian (and shooting) skills to good use.
A secret from Jack's past threatens to change his relationship with the family forever. Meanwhile, Amy tries to uncover the connection between her new client and the unusually secretive Jack Bartlett. An incident spooks the Heartland horses, causing Phoenix to bolt, and while searching for her horse, Georgie comes clean about her true feelings for Adam. And as for Ty, he grows increasingly ill as he attempts to get back to Amy.
Amy and the family pull together as the gravely ill Ty returns home and is admitted to the hospital. Meanwhile, Georgie discovers that Adam and Olivia are dating and must overcome her jealousy in order to help Olivia save Budget Buster's life. With Lou's franchise deal on the verge of collapse, she considers involving a controversial investor.
Amy, Ty and the entire Heartland family are thrilled to welcome a new member into the fold.