While pretending to be Eliot Ness, Nate gives Ray the alias "Bob De Niro". Robert De Niro played Al Capone in The Untouchables (1987), a film that is referenced numerous times in the episode.
Homages to "The Untouchables" movie include Ray imitating Sean Connery and commenting that Ness looks nothing like Kevin Costner, musical cues for Capone that recall the film, and Nate giving Ray the cover name "Bob DeNiro", after the actor who plays Capone.
The device that Eobard Thawne uses on Professor Stein is the same device Thawne uses to become Harrison Wells in The Flash(2014).
Mick Rory aka Heat Wave tells Jax to "Let it go kid, there's nothing you can do about the speedsters." This references his characters' beginnings on The Flash (2014).
The episode title references a famous speech given by Sean Connery in "The Untouchables".