Hanzee Dent

In 1979, Hanzee accompanies Dodd Gerhardt to a meeting with Dodd's younger brother Rye, watching Dodd confront Rye about not earning enough money for the family. When the Kansas City Mafia comes to Fargo and threatens to eliminate the Gerhardt family and take their territory, Hanzee stood by Dodd in his use of violence before they do, while Dodd's mother Floyd wanted to use diplomacy.

Meanwhile, Rye botched an attempt at threatening a judge into helping Skip Sprang, a business partner of his, resulting in Rye murdering the judge as well as the cook and waitress at a diner. Following this, Rye was hit by a car driven by Peggy Blumquist, who drove home with him in her windshield and where he was killed by her husband Ed in self-defense. This sparked a chain of events that led to Dodd tasking Hanzee with tracking Rye down before Kansas City could. Dodd's daughter Simone tips off Hanzee about a lead on Rye, and they ambush Skip at Rye's apartment. He is brought to Dodd for interrogation. Learning that Skip has no information on his brother's whereabouts, Dodd and Hanzee force Skip into an open grave and bury him alive in hot asphalt. Dodd then tells Hanzee to do what is necessary to find Rye, beginning in Luverne. Hanzee's investigation leads him to find Rye's belt buckle in the Blumquist fireplace. He and Dodd concoct a story—in which Ed is a hitman called "The Butcher" hired by Kansas City to kill Rye—in an attempt to rile Floyd into bloodshed. She has Hanzee and accomplices ambush a group of Kansas City men during a hunting trip. Hanzee kills Joe Bulo and a Kitchen brother and sends the former's head to Mike Milligan.

When Floyd insists that "The Butcher" be executed, and Charlie released from jail, Dodd and accomplices arrive at the Blumquist residence hunting Ed, while Bear fetches Charlie. Hanzee knocks out Hank, but Peggy subdues Dodd in her basement using his stun rod. Bear and his men arrive on-site as Weathers leaves. Knowing Ed will be shot swiftly, Lou hatches a plan. Karl Weathers distracts Bear while Lou sneaks Ed out a rear window, narrowly avoiding Hanzee. Bear and his men leave without incident. Hank, now well enough to drive back to town, intercepts Lou and Ed, though Ed runs off, presumably back to Peggy. Hanzee follows him shortly thereafter. A manhunt for Hanzee is organized after he shoots five individuals at a bar. He finds Constance in her hotel room at the seminar and unsuccessfully forces her to lure Peggy to reveal her general whereabouts, strangling her afterward. A gas station attendant calls the police after he recognizes Hanzee in his shop, prompting Hanzee to kill him. Hanzee finds the cabin and holds Ed and Peggy at gunpoint and asks for a haircut from Peggy before shooting Dodd in the head. Lou and Hank burst through the rear door and exchange gunfire with Hanzee as Peggy stabs him in the back with the scissors. Hanzee flees out the front door.

Observing the police setting up a sting to apprehend Milligan, Hanzee decides to betray the Gerhardts. He lies to Floyd and Bear by claiming Dodd is being held inside the motel by the Kansas City mob. Meanwhile, Lou stops at the gas station to call home, unaware his wife has collapsed, then discovers that Hanzee killed the attendant. Lou rushes to warn the others and arrives to find the Gerhardts on the offensive against Cheney and his team. By the time the shootout is over, Bear and all of the Gerhardt soldiers are dead, as are all of the cops except for Hank and Schmidt. Hanzee stabs Floyd to death and, as he moves to kill the Blumquists, a UFO appears in the midst of the chaos, distracting him long enough for Peggy to throw hot water in his face, scalding him.

The Blumquists manage to flee the premises, with Hanzee in hot pursuit for reasons that are, according to the narrator, lost to history (with the narrator positing that Hanzee most likely wants to get rid of the two people who saw his true colors when he asked Peggy to cut his hair after he killed Dodd). Hanzee shoots Ed as he and Peggy flee through an alley. The pair take shelter in the meat locker of a supermarket. Ed eventually succumbs to blood loss, causing Peggy to have a mental breakdown and hallucinate that Hanzee has set the supermarket ablaze to smoke them out. However, the latter has since fled. Sometime later, a confidant gives him a new identity, Moses Tripoli, and asks him if he would want plastic surgery. Hanzee vows to take revenge on Kansas City, echoing his future "Not Apprehended, Dead" remark, before rescuing the future Mr. Wrench and Mr. Numbers from a schoolyard bully.

Hanzee appears in two scenes in season one. By this time, he is known as Moses Tripoli, his appearance has changed and he is the boss of the Fargo Crime Syndicate. During a meal at a Chinese restaurant, he is informed that Mr. Wrench and Mr. Numbers have been sent to apprehend Sam Hess' killer. However, he insists that the killer be murdered not apprehended, regardless of motive, to send a message. This leads to his own undoing, however, since Malvo survives his would-be killers and learns that the syndicate sent them. Arriving in Fargo, Malvo storms the headquarters, murdering 22 men, including Tripoli.