CREATE TABLE table_30597 ("No. in series" FLOAT, "No. in season" FLOAT, "Title" TEXT, "Directed by" TEXT, "Written by" TEXT, "Original air date" TEXT, "U.S. viewers  ( million ) " TEXT)

What's the smallest season number?
SELECT MIN("No. in season") FROM table_30597
SELECT MIN("No. in season") FROM "table_30597"