CREATE TABLE table_72940 ("No. in series" FLOAT, "No. in season" FLOAT, "Title" CLOB, "Directed by" CLOB, "Written by" CLOB, "Original U.S. air date" CLOB, "Prod. code" FLOAT, "Viewers  ( millions ) " CLOB)

How many million viewers watched episode 6?
SELECT "Viewers (millions)" FROM table_72940 WHERE "No. in season" = '6'
SELECT "Viewers (millions)" FROM "table_72940" WHERE "No. in season" = '6'