DeVoe suggests "The Fiddler" as a nickname for Izzy, referencing her male comic counterpart Isaac Bowin, who first appeared in All-Flash #32 (January 1948).
The song sung by Izzy Bowin at the beginning of the episode is the country single "Somethin' Bad" by Miranda Lambert and Carrie Underwood.
Ralph suggests "Soundwave" as a nickname for Izzy Bowin, before Cisco shoots it down as it's already the name of a Transformer. In fact, there are a number of Transformers with this name.
One of Izzy's updates mentions a "starfish situation" in Blue Valley, a callback to Therefore I Am (2017), in which Wally mentions having battled a "starfish from outer space", a reference to Starro.
Ralph says "Killer robots come out of this elevator." This is a reference to Metallo coming out of the elevator and shooting Supergirl in Crisis on Earth-X, Part 4 (2017), Legends of Tomorrow episode 3x8.