CREATE TABLE table_15026994_2 (original_air_date VARCHAR2, viewing_figure VARCHAR2)

What original air dates are associated with a viewing figure of 7.27 million?
SELECT original_air_date FROM table_15026994_2 WHERE viewing_figure = "7.27 million"
SELECT "original_air_date" FROM "table_15026994_2" WHERE "7.27 million" = "viewing_figure"