CREATE TABLE table_25597 ("No." FLOAT, "Title" CLOB, "Directed by" CLOB, "Written by" CLOB, "Original air date" CLOB, "U.S. viewers  ( in millions ) " CLOB, "18-49 Rating/Share" CLOB)

What was the original air date of episode number 1?
SELECT "Original air date" FROM table_25597 WHERE "No." = '1'
SELECT "Original air date" FROM "table_25597" WHERE "No." = '1'