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.

Ty has to perform surgery. Amy and Georgie take care of the new foals. Lou and Mitch deal with their attraction towards each other.

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 faces a dilemma, old feelings are rekindled.

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'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.

Amy helps a mounted archer reconnect with her horse. Meanwhile Georgie's relationship is tested when Adam finds her spending time with another guy. And Lou is surprised by Mitch's reaction when she unexpectedly descends on his fishing trip.

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.

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. Jade's newfound status from a sponsorship deal goes to her head.

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. In Mongolia, Ty and Bob try to save an endangered bear's life.

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. Peter and Lou address the divorce papers and the impact it will have.

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. Cassandra thinks Caleb is cheating on her. Jade sees a new side of Clay.

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. Jade gets her pro rodeo permit.

Mallory arrives unexpectedly at Heartland, which has Amy and Jack questioning the real reason for the surprise visit. Meanwhile, Lou is upset to learn that her future plans with Mitch may be in jeopardy.

Jake's unexpected arrival prompts Mallory to reveal why she really came to Heartland. Georgie helps Amy with an under-performing cutting horse. Lou and Mitch struggle to find the perfect moment to tell the family about their relationship.

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. Tim steps up when Jade's plans fall through.

A secret from Jack's past threatens to change his relationship with the family forever.

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. One of Lou's investors pulls out at the last minute.

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.