Gabriola as Leviathan Headquarters
The Leviathan agent reports her failure to acquire the amulet to Rama Khan, the head of the organization. Later, Alex and Brainy find the exterior of the building but are thwarted by security.
“Tremors” Filming Locations
The truth of Leviathan is revealed sending Kara & Lena to the Fortress of Solitude to find a weapon to fight them while J'onn tries to find a way to save his brother.
Supergirl episode “Tremors” was filmed in Vancouver, West Vancouver, & Maple Ridge in Canada.
Whytecliff Park as Park
Lena is giving a press conference about a nature preserve project when Rama Khan attacks.
Grover Road Dock as Dock
Alex and Brainy track the signature from Russell Rogers' suit only to find a explosive trap waiting for them.