657 37th Avenue West as Midvale High School
Alex drops Kara off at prom and Kara tries to have a serious talk with Kenny but is interrupted by a meteor.
“Prom Again!” Filming Locations
Nia and Brainy manage to royally screw up the past and search for a way to fix things.
Supergirl episode “Prom Again!” was filmed in Vancouver in Canada.
UBC Baseball Field (UBC) as Midvale High School (baseball diamond)
Brainy and Nia watch from near their ship as Kara smashes into the kryptonite meteor.