Colt tries to round up the other ranchers to give Neumann’s Hill some competition. After another argument with Abby, Colt signs the divorce papers.
In the series finale, Luke opens up about his struggles, Maggie throws one last Christmas party at the bar, and Colt gives Beau a heartwarming gift.
Jerry warns Colt that Lisa Neumann has a good case against him. And when Luke bails on work, Colt has to miss Peyton’s baptism.
Luke’s friend from the service offers him a job. Meanwhile, trouble brews with the co-op. Maggie tells Beau that she’s met someone new.
Luke urges Mary to go back to rehab. The police find a gun near the trailer and make an arrest, leaving Colt struggling with his conscience.
Maggie returns from Florida with news. When Dale uncovers a problem with the herd, Colt weighs whether to tell Lisa Neumann.
Colt finally wins back Abby’s trust — but he’s afraid to tell her he knows who killed Nick. Beau and Joanne look for a house together.
As Colt battles the elements, he leaves Abby a poignant message. Armed with a new perspective, Beau surprises Joanne.
Abby invites Colt out for a birthday dinner … which might be a date. But the plan goes off the rails after Colt has an argument with Luke.
To celebrate their last Thanksgiving on the ranch, Colt and the guys go on a turkey hunt. Mary checks into rehab.
Luke, Colt and Beau find Mary in bad shape in Nick’s trailer. While Luke brings Mary back to the ranch, Colt and Beau wait for Nick.
Colt, Beau and Luke bond during a road trip to New Mexico. Back home, Abby runs into Mary and Nick.
Gamby and Russell look to finish what they started; Gamby confronts Amanda about her relationship with Hayden.
Beau issues Luke an ultimatum. As Colt tries to prove himself to Abby, Luke makes him an offer — but Mary drives a wedge between them.
Gamby bonds with Amanda during teacher workday; Russell’s patience is tested; Dr. Brown deals with the sudden appearance of her ex-husband, Dascious.
Colt hides the truth from Abby as their financial woes go from bad to worse. A drunken night leads to an awkward morning after for Mary.
Amanda makes a deal with Gamby, while Dr. Brown takes a veteran teacher to task over a shipment of missing books.
Money troubles put a strain on Colt and Abby’s relationship. Beau tries to get Luke help for his PTSD but refuses to bail Colt out of a jam.
Abby and Beau pressure Colt to take Lisa’s deal, but support from the local ranchers leads him to waver. Stress causes Luke to lash out.
Dr. Brown orders Gamby to lighten up on discipline; Russell copes with a disruptive neighbor.
Beau’s softer side emerges when he takes Luke under his wing, but Colt doesn’t trust his cousin. Maggie comforts an exhausted Abby.
Colt asks Abby to lie to the police. Joanne and Beau have a heart-wrenching talk about the future. Mary tells Luke she wants to go to rehab.
Gamby and Russell eye a homecoming football game as a way to further break Dr. Brown’s spirit.
While Abby and Colt struggle with parenting an infant, another new arrival shakes things up at the ranch. Maggie confronts Mary.
At Colt and Luke’s encouragement, Beau and Joanne plan a celebration. Abby asks Colt to go to counseling. Mary’s downward spiral continues.
Gamby looks to impress Amanda on a field trip organized by Mr. Hayden, a good-guy history teacher.
Colt tries to keep his cool as he worries about Abby — and wonders if he’s ready to be a dad. Maggie catches Mary in a lie.
Out on bail, Mary breaks into her old house to grab her stash. After a talk with Dale, Joanne has a change of heart. Colt and Beau confront Lisa.
Gamby and Russell end up invading Dr. Brown’s private space and the vice principals are surprised by a school evaluator.
One month later, tensions run high as Colt and Abby scramble to get ready for the baby. Lisa Neumann makes Beau an offer.
Joanne shares difficult news with Beau. Abby helps Colt with a business idea. When Mary goes missing, Heather takes drastic measures.
When the principal of a high school retires, his two vice principals go to extremes to land the vacant job.
Beau intervenes to keep Colt out of trouble. Abby and Colt follow a lead. Maggie returns to Garrison, and Mary wrestles with guilt.
Beau gives Colt a taste of his own medicine. Mary asks Luke for help paying the mortgage. Colt confronts Abby about not getting to see Peyton.
After a fight with Nick lands Colt in hot water, Mary presses her ex for the truth. Beau delivers troubling news.
Back in Colorado, Luke works to win back Colt and Beau’s trust. Abby invites Colt to a teachers’ mixer. Mary struggles to stay clean.
While Abby’s in Denver teaching, Colt works to rebuild the Peterson ranch. Rooster misses his first day of work.
Abby asks Colt for space, but he finds every excuse in the book to drop by. Luke and Mary tie the knot in Vegas. Lisa Neumann accuses Colt of theft.
Nick confronts Rooster. Running out of options, Colt reaches out to Lisa Neumann. Joanne urges Beau to make peace with Colt.
Beau’s at the end of his rope and decides to teach Colt and Rooster a lesson. Mary realizes she needs to choose between Rooster and Nick.
