Holland Park as Park
An alien couple is out walking for the evening when they are attacked by the Children of Liberty who found them with an alien-detecting dog.
Source: EmmaLeBaroness — Twitter via What's Filming
“Call to Action” Filming Locations
The Children of Liberty drop a manifesto over the city the day before Thanksgiving as James tries to get closer to the group despite Lena's misgivings.
Supergirl episode “Call to Action” was filmed in Langley, Vancouver, & Surrey in Canada.
8921 Glover Road as Lockwood Home
Ben Lockwood arrives home and his son shows him a news report about the manifesto. Later, he sits with his family for Thanksgiving dinner.
Source: AprilBC23 — Twitter via What's Filming
204 Street (between 98 & 98a) as Meeting Tom
James meets with his contact from the Children of Liberty and finds a scary dog when he trying to get into the guy's van.
98a Avenue (between 203a & 204) as Neighborhood Patrol
James talks to Tom about the Children of Liberty while they walk his dog down the street.
Alley (south of Homer, west of Pender) as Alley
A Children of Liberty gang collects their weapons and strides out to murder aliens.
20433 98a Avenue as Tom's House
James tries to talk Tom out of taking part in the attack but ends up having to fight him.
Del Mar Inn as Del Mar Inn
Brainy effortlessly defeats a band of Children of Liberty thugs who find him erasing the anti-alien symbol from the door of a building.
8967 Glover Road as Manchester's Ambush
Manchester waits for a group of Children of Liberty thugs inside a targeted home and shoots them all.
Source: AprilBC23 — Twitter via What's Filming
Hamilton Street (between Dunsmuir & Pender) as Main Street
Alex is attacked by the alien dragon and Kara defends her and flys off to fight the dragon.
Harold's Custom Equipment Rentals as Under the Bridge
Kara is thrown to the ground by the dragon and gets a tip from Alex which allows her to calm it down.
Langley Sportsplex as Parking Garage
James meets with Tom who then has him kidnapped by a group of Children of Liberty thugs.