Take a look at "The Flash" episode "Goldfaced", directed by Alexandra LaRoche, airing February 5, 2019 on The CW:
"...'Barry' (Grant Gustin) and 'Ralph' (Hartley Sawyer) must go undercover as criminals in an illegal black market to purchase a device that could help them stop 'Cicada' (Chris Klein).
"Once inside, Barry and Ralph find their morality tested as they slip deeper into the criminal world...
"...eventually having to choose between committing a crime, or losing the means to defeat one of their greatest foes.
"Meanwhile, 'Iris' (Candice Patton) investigates a lead on Cicada's whereabouts and ends up in a dangerous situation..."
Click the images to enlarge and Sneak Peek "Goldfaced"...