CREATE TABLE table_30598 ("No. in series" FLOAT, "No. in season" FLOAT, "Title" TEXT, "Directed by" TEXT, "Written by" TEXT, "Original air date" TEXT, "U.S. viewers  ( million ) " TEXT)

How many people watched the episode 'bad girls'?
SELECT "U.S. viewers (million)" FROM table_30598 WHERE "Title" = 'Bad Girls'
SELECT "U.S. viewers (million)" FROM "table_30598" WHERE "Title" = 'Bad Girls'