CREATE TABLE table_436 ("Series #" FLOAT, "Season #" FLOAT, "Episode title" CLOB, "Writer ( s ) " CLOB, "Director" CLOB, "U.S. viewers  ( millions ) " CLOB, "Original air date" CLOB)

What is the series number of the episode watched by 10.89 million viewers?
SELECT MAX("Series #") FROM table_436 WHERE "U.S. viewers (millions)" = '10.89'
SELECT MAX("Series #") FROM "table_436" WHERE "U.S. viewers (millions)" = '10.89'