CREATE TABLE table_2894 ("No. in series" FLOAT, "No. in season" FLOAT, "Title" TEXT, "Directed by" TEXT, "Written by" TEXT, "U.S. viewers  ( million ) " TEXT, "Original air date" TEXT, "Production code" FLOAT)

What number was there 6.01 million u.s. drivers?
SELECT "No. in season" FROM table_2894 WHERE "U.S. viewers (million)" = '6.01'
SELECT "No. in season" FROM "table_2894" WHERE "U.S. viewers (million)" = '6.01'