Custom House as UNIT Safe House (interior)
Kate runs the UNIT operation with the Zygon.
Source: The Doctor Who Locations Guide
“The Zygon Invasion” Filming Locations
Clara and the Doctor must work with UNIT to stop the Zygon’s from taking over the world.
Doctor Who episode “The Zygon Invasion” was filmed in Cardiff in the United Kingdom.
Canal Park as Brockwell Park
The Doctor attempts to talk with the two Zygon commanders posing as little girls.
Source: The Doctor Who Locations Guide
FIBUA Village (Sennybridge Training Area) as Turmezistan Village
The Doctor heads to the Zygon occupied village with UNIT to rescue Osgood.
Source: The Doctor Who Locations Guide
Lydstep Flats as Clara's Flat
Clara arrives at her apartment and investigates the strange behavior of her neighbors.
Source: The Doctor Who Locations Guide
Allensbank Primary School as Drakeman Junior School
Clara, the Doctor, and UNIT head to a school that housed the Zygon command center.
Source: The Doctor Who Locations Guide
MOD St Athan as Airfield
The Doctor leaves the his airplane and Kate heads off to New Mexico.
Source: The Doctor Who Locations Guide
Barry Shooting Range as Zygon Tunnel
Clara finds her way down into the Zygon tunnels beneath her flat.
Old Knap Swimming Pool as Seaside
Zygon!Clara talks to the Doctor on the phone and then pulls out a missile launcher.