For the eponymous character, see Izzy Bowin.
"Subject 9" is the fourteenth episode of the fourth season of The Flash, and the eighty-third episode overall. It aired on February 27, 2018.


Barry meets a powerful woman whose abilities could help him in his battle with DeVoe. Meanwhile, after learning that DeVoe is targeting everyone who was on the bus, Ralph decides he doesn’t want to be a hero anymore, his only concern is staying alive. Harry offers to help Cecille.


  • 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" in which Wally mentions having battled a "starfish from outer space", a reference to Starro.
  • DeVoe suggests "The Fiddler" as a nickname for Izzy, referencing her genderswapped comic counterpart, Isaac Bowin.
  • Ralph tells Barry that "this Turner don't need no Hooch", referencing the 1989 detective comedy film Turner & Hooch'.
  • Izzy says a fiddle would only help in a fight against the Devil, referencing the Charlie Daniels song The Devil Went Down to Georgia".
  • When the team discovers a digital representation of the warping signature of DeVoe, Cisco exclaims "space: the final frontier", referencing the tagline for the Star Trek franchise.