CREATE TABLE table_66388 ("Title" TEXT, "Series" TEXT, "Director" TEXT, "Production Num." TEXT, "Release date" TEXT)

What series has 1935-07-13 as the release date?
SELECT "Series" FROM table_66388 WHERE "Release date" = '1935-07-13'
SELECT "Series" FROM "table_66388" WHERE "Release date" = '1935-07-13'