CREATE TABLE table_19797 ("#" FLOAT, "Episode" TEXT, "Writer" TEXT, "Director" TEXT, "Original air date" TEXT, "Viewing figure" TEXT)

What is the # for the episode with viewing figures of 7.02 million ?
SELECT MAX("#") FROM table_19797 WHERE "Viewing figure" = '7.02 million'
SELECT MAX("#") FROM "table_19797" WHERE "Viewing figure" = '7.02 million'