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.

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.

Colt, Beau and Luke bond during a road trip to New Mexico. Back home, Abby runs into Mary and Nick.

Joanne shares difficult news with Beau. Abby helps Colt with a business idea. When Mary goes missing, Heather takes drastic measures.

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.

At Colt and Luke’s encouragement, Beau and Joanne plan a celebration. Abby asks Colt to go to counseling. Mary’s downward spiral continues.

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.

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.

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.

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.