Marty is a main character in the Netflix series, Ozark. He is the husband of Wendy Byrde, father of both Charlotte and Jonah Byrde, and a financial advisor turned money launderer.
In Season 1, Marty moves his family from Chicago to Missouri Ozarks in order to launder money for the drug cartel that would have otherwise had him dead. He considers Missouri to be a safer and less competitive place. So he purchases a strip club to help him achieve this goal. Unfortunately, his presence gets him in trouble with the family that runs crime in the area - the Langmores.
Marty ends up hiring the ambitious 19-year-old Ruth Langmore to help him with running the strip club. Since Ruth is on his side, the Langmores refrain from killing him.
Later on, Marty proposes a working relationship between the cartel and the Snells. As part of the deal, the cartel will be distributing heroin for the Snells. When things go south and Darlene shoots Del, Marty later has to answer to the cartel. He convinces them that he can launder $500 million for them if they spare his life.
In the second season, Marty has to launder $500 million. He realizes that a strip club and a funeral home in a rural area can't manage to clean that amount of money so Marty has the idea to open a riverboat casino.
As season two draws to a close, Marty and Wendy work as a team to get the riverboat idea off the ground in spite of resistance from the Kansas City Mafia and political red tape. the season finale, the casino is finally launched.
Marty and Wendy continue to struggle in their marriage and go to couple's therapy. Marty tries to bribe the therapist, Sue, to help her side with him more often. As Wendy tries to take control of their moves with the cartel, Marty asks her to be cautious now that the FBI is involved.
New agent, Maya Miller, approaches Marty about making a deal - 18 months prison and the promise to help the FBI catch other money launderers in exchange for his eventual freedom. Marty initially accepts the deal before being kidnapped by the cartel. He sits in a cell for several days while Omar Navarro decides his worth. Eventually, Omar lets him go back to the Ozarks.
He denies Maya her deal and tries to secure his family's well being by continuing to launder more money. Eventually, he and Wendy win Omar's trust over Helen's and Omar chooses to continue working with the Byrdes and to eliminate his relationship with Helen by killing her.
Money is, at its essence, that measure of a man's choices.
Marty: "You see, the hard reality is how much money we accumulate in life is not a function of who's president or the economy or bubbles bursting or bad breaks or bosses. It's about the American work ethic. The one that made us the greatest country on Earth. It's about bucking the media's opinion as to what constitutes a good parent. Deciding to miss the ball game, Del play, the concert, because you've resolved to work and invest in your family's future. And taking responsibility for the consequences of those actions. Patience. Frugality. Sacrifice. When you boil it down, what do those three things have in common?"- Sugarwood
Marty: "I mean why does he have to feel bad just so you can feel good? Plus when you disrespect him, you disrespect this whole place. And you might be able to get away with that crap at the dive bars your used to going to but not here. I won't tolerate it."
Big Redneck: "You won't tolerate it?"
Marty: "That's right. I won't tolerate it."- Blue Cat
Marty: "Yeah I don't think you're aware, but a few weeks ago I was in your club and I was talking to a few people you employ and I found out you like to vacation in Panama. I thought why Panama? Why not Mexico or Belize? Unless it had something to do with the fact Panama is a hub for money laundering."
Bobby Dean: "Want my fucking lawyer"
Marty: "You want the Panamanian lawyer? The one that sets up the shell companies for you to launder your money through your club. I mean what are the odds that we both done considerable time in Panama? That's like..What is it? Three to one at least. What are the odds that we both recognise the value of the legal community in that country? That's five to one I'll bet ya. But what are the odds that we would both be drawn to the work of the contracts lawyers at the law firm of Machado Filippo? Those odds are very long. Yeah?"
Bobby Dean: "I ain't fucking talking to you."
Marty: "It's okay, you can just listen.'Cause I'm just thinking out loud about how shell companies work. Y'know the, the miracle really that makes it possible to move money around without countries being able to track it. I'm just, I'm fascinated by it. What has me thoroughly taken is how a man can own and operate a company without ever putting his name on it, so that every move, every transaction is perfect undetectable. Think about that. How is that possible? How if you never put your name on a company do you ever even own the company? I don't get it, I mean it's something to ponder isn't it? I mean that guy would have to be in possession, physical possession, of that company's bare shares. Yeah? The piece of paper, the deed to his empire. It would all come down to that wouldn't it? And if he was in possession of that piece of paper, where do you think he'd keep it? You think he'd put it in the safe? In a manila envelope...in the false bottom of that safe? Now I don't go to church and I don't consider myself a Christian. I don't consider myself anything, but I do like to think that I follow a certain code. So even though I now am in possession of that little piece of paper...I'm not gonna take your club. I'm gonna buy it. And as I said...I'm able to make you a very fair offer. So...One seventy five?