Walt seeks closure for his wife's murder and Henry's case. Meanwhile, Branch is suspended but continues to investigate Jacob Nighthorse.
While Walt makes a breakthrough in the David Ridges case, Branch's conduct is worrisome. Henry has a setback in his trial. Vic decides what her future will be.
A farmer's death is investigated but a life insurance policy causes difficulties. Later, Sean gives Vic an ultimatum.
Walt forms an unlikely alliance after Vic and Sean are kidnapped.
A man missing for 30 years turns up dead. Later, Henry makes a risky decision.
Walt attempts to narrow the field of suspects in his wife's murder. Meanwhile, Branch's behavior causes trouble.
Walt and the team search for missing teenage campers.
Walt is asked to judge a pageant during an ongoing murder investigation. Meanwhile, Cady turns to an old friend for help.
Walt investigates the murder of a Russian adoptee. Meanwhile, Henry faces trouble in jail.
Walt deals with the repercussions from Henry's arrest and Branch's shooting. Looking for the shooter proves complicated when Branch reveals who shot him.
Walt and Branch investigate an apparent suicide that may be linked to Cady's accident. Walt and Henry must face up what took place in Denver when Detective Fales shows up with warrants.
A severed finger shows up at the station and Walt connects it to a new murder and a twenty year old armed robbery. Vic confides to Walt that she's being stalked.
Longmire links up the death of a game warden and a poached elk to an expensive supplement. Cady wakes up after Longmire concludes his sacrifice. Branch is closer to discovering what really happened to Cady.moreless
On Election Day, Walt and Branch see things with a new outlook as they race to find a hit-and-run driver.
An explosion on the reservation has the Cheyennes blaming an energy company's fracking. Branch hooks up again with Cady and finds some information he can use to his advantage in the election.
Walt suspects a local farm is running an illegal rodeo after a wild horse is found dragging a body. Detective Fales arrives to speak with Henry.
Walt and his team try to piece together the information Henry overheard so they can prevent a woman from being murdered. Vic becomes very suspicious when an ex-cop from her past shows up in town.moreless
Contrary Warrior advises Walt about an alleged psychic's murder but it requires interpreting backward clues. Sheriff candidate Branch and Walt face off in a public debate.
The sale of illegal prescription drugs appears to be connected to a teenager's death. Cady returns home while Henry catches up with a former flame.
Cattle thieves are suspected when livestock and a driver go missing. Vic is alarmed by a flower bouquet with no name.
Walt looks into the death of a shepherd and his dog in Absaroka's Basque community. Branch has thrown in with Jacob Nighthorse who is contributing to his campaign. Cady goes to Detective Fales for information about her mother's death.moreless
Abusive behavior and a body found in a compost heap lead to a diverse list of suspects and forces Walt to cross county lines to find the killer. Branch confronts Walt in his search for Cady.moreless
After a prison transfer goes wrong, Walt pursues a serial killer, the other escapees and hostages up a mountain. An impending storm, limited resources and hypothermia join to force Walt to face his past.moreless
When two of the four teenagers acquitted of raping a Cheyenne girl are murdered, it looks like revenge. But Walt isn't convinced by the evidence and he sets out to find the real killer. Walt faces up to the reality of his wife's death.moreless
Walt investigates the world of underground poker games after the Tribal Council president, who had a gambling problem, is found dead in his car on county land. The list of suspects starts to mount when tribal politics are taken into consideration. Walt feels betrayed when he finds out about Cady and Branch's affair.moreless
After a gas station owner is killed, Walt asks Henry to help track down the barefoot young woman who enlisted the station owner's help while claiming to be in danger. The trail leads them an abandoned baby and a dangerous cult.moreless
A bronc rider, an affair and a secret about a seemingly worthless painting are only a few of the possible motives for why a wealthy beer distributor is found severely beaten. Vic's husband drops in and she makes a great effort to deal with his jealousy of her bond with Walt. Damaging information comes to light that could ruin Branch's campaign.moreless
When a convicted murderer is released early due to overcrowding and then found mauled by a bear, the list of suspects is long. Walt suspects someone baited the bear to attack so the team sets out to track down the bear and the person who used the bear to commit murder. Branch's uncle is taken into custody when he fires his shotgun in his retirement home.moreless
Walt and his team look for a missing unregistered sex offender when several Cheyenne foster children go missing. The children at the foster home insist the others were taken by a "dog soldier" but Walt knows it wasn't a spirit who kidnapped the children.moreless
When Longmire has two dead bodies and a Mexican drug cartel to sort out, he asks Henry for help.