This is the second time Hilarie Burton and Barry Corbin have worked together. The first time being One Tree Hill (2003).
Val Kilmer and Barry Corbin have both appeared in the Lonesome Dove series. Corbin appeared in the original Lonesome Dove, while Kilmer appeared in the prequel, Comanche Moon. In addition, Kilmer's father was born and grew up in Texas, as did Corbin. Corbin's father was named Kilmer Corbin.