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.

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.

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.

One month later, tensions run high as Colt and Abby scramble to get ready for the baby. Lisa Neumann makes Beau an offer.

Beau's softer side emerges when he takes Luke under his wing, but Colt doesn't trust his cousin. Maggie comforts an exhausted Abby.

While Abby's in Denver teaching, Colt works to rebuild the Peterson ranch. Rooster misses his first day of work.

While Abby and Colt struggle with parenting an infant, another new arrival shakes things up at the ranch. Maggie confronts Mary.

When Colt Bennett returns home from Canada to try out for a semipro Denver team, he learns that his family's ranch has fallen on hard times.

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.

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.

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.

After a fight with Nick lands Colt in hot water, Mary presses her ex for the truth. Beau delivers troubling news.

Beau intervenes to keep Colt out of trouble. Abby and Colt follow a lead. Maggie returns to Garrison, and Mary wrestles with guilt.

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.

Colt runs into an ex at Maggie's bar and reminisces with Rooster over a bottle of whiskey. Getting back in Beau's good graces is a losing battle.

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.

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.

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.

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.

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.

Maggie returns from Florida with news. When Dale uncovers a problem with the herd, Colt weighs whether to tell Lisa Neumann.

When his inflated ego lands him in hot water, Colt realizes he's not the big man on campus anymore. Beau's doctor makes him trade in steak for salad.

Rooster and Colt's long-simmering rivalry comes to a head on the first day of hunting season. But their bickering has an upside for Beau and Maggie.

Colt gets possessive when Heather starts dating a teacher. Abby gives Beau relationship advice. Maggie has a business proposition for Rooster

Colt and Abby start planning their wedding, but they don't see eye to eye. Joanne confesses she still has feelings for Beau.