The script notes that Jerry (Cooper Andrews) has transformed from "the king's lovable bodyguard" into something horrific in full beast mode."
Macsen Lintz, who plays Henry, is the brother of Madison Lintz, who played Carol's (Melissa McBride) daughter Sophia in Seasons 1 and 2.
The King's speech has definite echoes of the St. Crispin's Day monologue in Shakespeare's Henry IV Pt. II. Solid background for an actor playing a King.
The DP for this episode, Mike Scotemiz, prepared a special treat for the cast and crew. He arranged for a mariachi band to show up with Mexican food and "Faux-Garitas."
Cooper Andrews (Jerry) was creeped out by the chemical plant walkers. "They're melted and oozed. These are walkers you don't want to be eaten by."