As Marshals prepares to return for Season 2, fans of the Yellowstone universe have another reason to be excited: two familiar faces are continuing their journey alongside Kayce Dutton.
Gil Birmingham is returning as Thomas Rainwater, while Mo Brings Plenty is back as Mo. Both characters have deep connections to Kayce and the wider Dutton story, and their presence gives Season 2 another opportunity to explore relationships that longtime Yellowstone viewers already know well.
Thomas Rainwater and Mo are more than familiar faces from the original series. They have become important figures in Kayce Dutton’s story, particularly as his life has become increasingly separated from the ranch and centered on a new path as a U.S. Marshal.
CBS has described Rainwater and Mo as important confidantes for Kayce, suggesting that their relationship with him will remain meaningful as the new season unfolds. Season 2 is also expected to put more attention on Broken Rock and the challenges facing the reservation, potentially giving the characters more room to develop their own storylines.
Kayce’s relationship with Rainwater and Mo has always been complicated by the history between the Dutton family and the Broken Rock community. Yet over time, Kayce developed a level of trust and respect with both men that set their relationships apart from many of the conflicts surrounding him.
Luke Grimes has also confirmed that Kayce remains close with Rainwater and Mo during the new season. That connection could become particularly important as Kayce faces the challenges that come with his new career and life away from the Yellowstone Ranch.
For Mo and Kayce, the relationship has also developed into something deeper than simple professional cooperation. Mo Brings Plenty has previously described their bond as a brotherhood built on respect and trust, highlighting just how important Kayce has become to him.
That history makes their return especially significant for fans who have followed these characters since Yellowstone.
Season 2 could potentially give viewers more moments between Kayce, Rainwater, and Mo while also expanding the story around Broken Rock. Whether that means more personal conversations, new conflicts, or greater involvement in Kayce’s cases remains to be seen.
Meanwhile, the return of these characters reinforces the connection between Marshals and the larger Yellowstone universe. Although Kayce is now following a different path, familiar relationships continue to follow him into this next chapter.
Marshals Season 2 is scheduled to premiere October 4, 2026, on CBS and will also stream on Paramount+. The season gives fans another chance to see where Kayce’s story goes—and whether Rainwater and Mo become an even bigger part of his journey.
With their history, loyalty, and connection to Kayce, there is plenty of room for Rainwater and Mo to make their presence felt.