H.R. slides under the closing door and retrieves his drumstick in the same manner that Indiana Jones does for his hat.
The 2024 Flash costume is closer in design to the traditional comic costume as it sports a brighter red, smoother surface with a more pronounced yellow belt and lightning trim.
Iris West was born on June 24, 1989. This is exactly one year after Candice Patton's real life date of birth.
The title of this episode is a reference to the 1958 novel "The Once and Future King" by T.H. White as well as the comic book The Flash #79 (August 1993), which was entitled "The Once and Future Flash".