The pups are all seen in medieval gear for the first time.
This is the first time a character gets sick. It was Chase.
This is, however, the second time any member of the PAW Patrol is under Katie's medical care for any reason, the first time being "Pup Pup Boogie" in which Rubble is under Katie's care on account of a sprained paw.
It is revealed that Marshall has stage fright, especially as a last-minute substitute.
This is the first time Marshall is seen on the title card in his medic gear instead of his firefighting gear.
A crown appears on the title card along with Marshall.
The title of the title card has a castle texture.
In this episode, Ryder does not say, "Whenever you're in trouble, just yelp (or whatever is substituted) for help!"
The Brazilian, British, Italian, and Latin American broadcasts of Nickelodeon and of Nick Jr. places this episode as the first half instead while "Pups Save a Ghost" serves as the second half. The Brazilian and Latin American broadcasts later reversed this following the Brazilian redub of the episodes.
The bone in the play is a reference to the legendary Excalibur, the magical sword which King Arthur pulled out of a rock.
The Play is mostly based in King Arthur which is set during the Medieval Ages.