CREATE TABLE table_30649 ("No." FLOAT, "#" FLOAT, "Title" CLOB, "Directed by" CLOB, "Written by" CLOB, "U.S. air date" CLOB, "Production code" CLOB, "U.S. viewers  ( million ) " CLOB)

How many u.s. viewers (million) have 6 as the #?
SELECT "U.S. viewers (million)" FROM table_30649 WHERE "#" = '6'
SELECT "U.S. viewers (million)" FROM "table_30649" WHERE "#" = '6'