“Mad as a Hatter” Filming Locations

The Mad Hatter's mind-controlling hat ends up in the hands of Alice's biggest fan who is intent of springing his fave from Arkham.

Batwoman episode “Mad as a Hatter” was filmed in Vancouver, Burnaby, & Coquitlam in Canada.

Westside Church as Gotham University Medical School Graduation

Liam Crandle uses the hat to take control of the graduation ceremony to prove his hatred for doctors and force Alice's release.