'Justified' Season 5 Spoilers: Mary Steenburgen to Guest Star

On this season of southern law drama "Justified," viewers will find out why Raylan is afraid to visit the mother of his child. 

Series showrunner Graham Yost said that this season will delve deeper into Raylan's issues with his ex. "I think he's afraid, and he doesn't know why he's afraid," Yost said. "And that's something we'll get into over the season, as much as Raylan's willing to get into anything like that. But the simple answer is: Look at who his father was. That brings up a lot of concerns about what kind of father you will be." 

Fans will also see Mary Steenburgen head to Harlan this season. The Academy Award winner will play Katherine Hale, a Southern belle who was the wife of Wynn Duffy's crime mentor. Steenburgen will debut in Episode 10 and will recur in the rest of the season. 

Steenburgen has appeared in "Back to the Future," as well as on TV shows like "Wilfred," "30 Rock," "Bored to Death," "Curb Your Enthusiasm" and "Joan of Arcadia."

On the next episode, "Good Intentions," "Raylan takes over a mansion once run by a mob accountant, and Boyd tries to regain his stranglehold on the Harlan heroin market."

Walton Goggins told TVLine that in Episode 5, Boyd's inability to facilitate Ava's release from prison will cause him to explode with anger.

"There's a scene coming up in Episode 5 [where] I've never felt that kind of guttural anger from a person that I've been playing," Goggins shared, "and the ire is directed towards a person who has very much wronged Boyd and Ava. The way it comes out of his mouth and what he does is epic for me as an actor. And what happens immediately after this action is such an indication about where this guy is. It's just a release. 'Now, I can be calm.'"

It was also recently confirmed that "Justified" will have a sixth season, but it will be its last.

The cabler's CEO, John Landgraf, confirmed the news at the Television Critics Association winter press tour. He added that the decision was made by executive producer Graham Yost and series star Timothy Olyphant.

"They felt that the arc of the show and what they had to say would be served by six seasons instead of seven," said Landgraf, "and I regretfully accepted their decision."

The next episode, "Good Intentions," airs Tuesday, Jan. 21 at 10 p.m. on FX.