. . . "Erika Walter"@en . . . "Erika Walker"@en . . . . "Erika Walter (b. TBA) portrays Susan Lawton in Arrow."@en . . . . "Erika Walter (b. TBA) portrays Susan Lawton in Arrow."@en . . "Erika Walter"@en . . "Erika Walter"@en . . . . . "Erika Walter is an actress with dual American-Canadian citizenship. She portrayed Susie Lawton in the third season Arrow episode, \"Suicidal Tendencies\" and an unnamed woman in the second season of Supergirl."@en . . . "Erika Walter is an actress with dual American-Canadian citizenship. She portrayed Susie Lawton in the third season Arrow episode, \"Suicidal Tendencies\" and an unnamed woman in the second season of Supergirl."@en .