Lisa reveals to Amy that the racehorse she's working with is a clone. Jen throws a party at Maggie's in honor of Lou's success. Georgie convinces Adam to be Wyatt's math tutor.
Lou returns from New York and presents a difficult decision for Georgie to make about show jumping. Caleb makes a small mistake at the rodeo school. Jack and Lisa adjust to living together.
Amy and Ty prepare a wild horse for overseas transport but find it more difficult than expected. While training with Flame, Georgie is distracted by Wyatt's return.
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.
Jake's unexpected arrival prompts Mallory to reveal why she really came to Heartland. Georgie helps Amy with an under-performing cutting horse.
Mallory arrives unexpectedly at Heartland, which has Amy and Jack questioning the real reason for the surprise visit. Lou is upset to learn that her future plans with Mitch may be in jeopardy.
Tragedy strikes the community. Amy and Georgie try to help Tim's traumatized barrel racing horse. Jack helps Tim, Casey and the rodeo community pulls through a devastating loss.
Georgie struggles with a new horse riding challenge. Caleb returns from the rodeo circuit. Jack navigates back-to-school prep. Tim attends a pregnancy clinic with Amy.
Amy, plagued by cramps, stays with the horse trapped in the trailer while Georgie goes searching for Tim. Ty and Bob perform surgery on a Gobi bear cub shot by poachers.
An out-of-town horse clinic takes a dangerous turn for Amy, Tim and Georgie. Jack is caught in the middle when Mitch's elevated status makes Peter feel like an outsider.
Jack discovers the true reason behind his friend's visit. Amy is compelled to intervene when the new Extreme Team coach pits Georgie and her teammates against each other.
Amy helps Lou form a connection with a new horse. A crisis at the wildlife reserve bring Georgie and Adam together. When Jack faces a deadly threat it prompts Mitch to open up about his past.
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.
Trapped together at the ranch, Lou and new hand Mitch open up about their recent pasts. A conflicted Ty hesitates to open a package from his father.
When she returns from New York, Lou has her hands full with a new ranch hand at Heartland and a popular food truck making a dent in Maggie's business.
Georgie creates a school project about Briar Ridge owner Val Stanton and becomes inspired to take a risk with Adam.
A visit from Tim's ex-girlfriend shifts his perspective on his current relationship. Amy and Cass try to save a racehorse with a serious condition.
Tim suspects that a sponsorship offer made to Jade is not entirely legitimate, so he enlists Amy's and Georgie's help in persuading her to reject it.