“What's Past Is Prologue” Filming Locations

Nora comes up with a plan to neutralize Cicada's dagger and then travels back in time with Barry to important moments in his past to gather the ingredients.

The Flash episode “What's Past Is Prologue” was filmed in Burnaby & Vancouver in Canada.

Burnaby City Hall as Central City Hospital

Barry and Nora plant the device in a pillar in the past and then set up a trap for Cicada in present day.