Timothy Olyphant (Raylan) and Garret Dillahunt (Ty Walker), who share a scene, both appeared in the popular tv series Deadwood (2004). In fact, Dillahunt and Olyphant both tried out for the lead role, which would in the end go to Olyphant. Dillahunt would, however, appear in two separate important roles in Seasons 1 and 2 of Deadwood.
After Raylan tells Art that his daughter has been baptized Catholic, Art makes a joke about being her being papist. Contrary to stereotypes, Kentucky has a rather large population of Catholics, especially in its largest cities. Ten percent of Kentuckians are Catholic and within a one hour radius of Harlan, there are over one dozen Catholic churches.