CREATE TABLE table_17225 ("No. in series" FLOAT, "No. in season" FLOAT, "Title" CLOB, "Directed by" CLOB, "Written by" CLOB, "Original air date" CLOB, "Production code" CLOB, "U.S. viewers  ( millions ) " CLOB)

Which episode number in season 5 was viewed by 3.00 million U.S. viziers?
SELECT MIN("No. in season") FROM table_17225 WHERE "U.S. viewers (millions)" = '3.00'
SELECT MIN("No. in season") FROM "table_17225" WHERE "U.S. viewers (millions)" = '3.00'