Three Harbour Green as Rathaway Industries
Barry travels back in time and witnesses these events before replacing his past self.
“Flash Back” Filming Locations
When Barry decides to travel back in time to learn more about his speed from Eobard Thawne he attracts the attention of a dangerous creature.
The Flash episode “Flash Back” was filmed in Vancouver in Canada.
Alley (south of Granville, west of Pender) as Alley near Rathaway Industries
Barry waits for the right moment and then swaps himself out with his past self.