CREATE TABLE table_30813 ("Series #" FLOAT, "Title" TEXT, "Directed by" TEXT, "Written by" TEXT, "Original air date" TEXT, "Production code" FLOAT)

What is the episode series number of 'St. Joan'?
SELECT "Series #" FROM table_30813 WHERE "Title" = 'St. Joan'
SELECT "Series #" FROM "table_30813" WHERE "Title" = 'St. Joan'