CREATE TABLE table_16597 ("No." FLOAT, "Episode" CLOB, "Air Date" CLOB, "Timeslot" CLOB, "Rating" CLOB, "Share" FLOAT, "18\\u201349  ( Rating/Share ) " CLOB, "Viewers  ( m ) " CLOB, "Rank  ( # ) " CLOB)

Which timeslot did episode no. 15 hold?
SELECT "Timeslot" FROM table_16597 WHERE "No." = '15'
SELECT "Timeslot" FROM "table_16597" WHERE "No." = '15'