In the flashback at the beginning of the episode, one child offered to write the king's theme song and young Gareth says "Shut up, Menken." Alan Menken is one of the music producers on the show.
On Twitter the night that the show originally aired, star Timothy Omundson cited the song "Will My Day Ever Come?" as his favorite of the season.
This marks the first time in the series that Sid is seen in a different costume.