CREATE TABLE table_31325 ("Series #" FLOAT, "Title" CLOB, "Directed by" CLOB, "Written by" CLOB, "Original air date" CLOB, "Production code" CLOB, "U.S. viewers  ( million ) " CLOB)

What is the series # when the director is john showalter?
SELECT "Series #" FROM table_31325 WHERE "Directed by" = 'John Showalter'
SELECT "Series #" FROM "table_31325" WHERE "Directed by" = 'John Showalter'