CREATE TABLE table_2281 ("Series #" FLOAT, "Season #" FLOAT, "Title" TEXT, "Directed by" TEXT, "Written by" TEXT, "Original air date" TEXT, "U.S. viewers  ( in millions ) " TEXT)

What was the original air date for season 11?
SELECT "Original air date" FROM table_2281 WHERE "Season #" = '11'
SELECT "Original air date" FROM "table_2281" WHERE "Season #" = '11'