CREATE TABLE table_26666 ("Episode" FLOAT, "Broadcast Date" FLOAT, "BBC One Presenter ( s ) " TEXT, "Starring" TEXT, "Radio 1 Presenter" TEXT, "Viewers  ( millions ) " TEXT)

Who was the radio 1 presenter for the broadcast that had 9.73 million viewers?
SELECT "Radio 1 Presenter" FROM table_26666 WHERE "Viewers (millions)" = '9.73'
SELECT "Radio 1 Presenter" FROM "table_26666" WHERE "Viewers (millions)" = '9.73'