CREATE TABLE table_24056 ("Episode" TEXT, "Broadcast date" TEXT, "Run time" TEXT, "Viewers  ( in millions ) " TEXT, "Archive" TEXT)

Name the broadcast date for 7.4 viewers
SELECT "Broadcast date" FROM table_24056 WHERE "Viewers (in millions)" = '7.4'
SELECT "Broadcast date" FROM "table_24056" WHERE "Viewers (in millions)" = '7.4'