While shooting the bar fight, Jon Bernthal badly injured his hand and had to get surgery. His injury was written into the plot of Season 2.
When Frank says that he's just passing through to the next place he's just passing through, Beth calls him, "just a regular Sal Paradise." Sal Paradise is a main character from and the narrator of Jack Kerouac's novel, "On the Road."
The band playing in the roadhouse is Shooter Jennings.
Roadhouse Blues is the name of a song by The Doors.
Rex is wearing a Petr Mrázek jersey, who was a goalie for the Detroit Red Wings. He was traded to the Philadelphia Flyers on Feb 19, 2018. He currently plays for the Carolina Hurricanes.