CREATE TABLE table_16570 ("Character" CLOB, "Portrayed by" CLOB, "First appearance" CLOB, "Last appearance" CLOB, "Duration" CLOB, "Episodes" CLOB)

Which actors first appeared in 'Zoo York'?
SELECT "Portrayed by" FROM table_16570 WHERE "First appearance" = 'Zoo York'
SELECT "Portrayed by" FROM "table_16570" WHERE "First appearance" = 'Zoo York'