CREATE TABLE table_30329 ("No. in series" FLOAT, "Title" CLOB, "Directed by" CLOB, "Written by" CLOB, "Original air date" CLOB, "Production code" FLOAT)

Who wrote episode number 19 in the series?
SELECT "Written by" FROM table_30329 WHERE "No. in series" = '19'
SELECT "Written by" FROM "table_30329" WHERE "No. in series" = '19'