CREATE TABLE table_151 ("Rank" FLOAT, "English title" CLOB, "Chinese title" CLOB, "Average" FLOAT, "Peak" FLOAT, "Premiere" FLOAT, "Finale" FLOAT, "HK viewers" CLOB)

what's the premiere with hk viewers of 2.09 million
SELECT "Premiere" FROM table_151 WHERE "HK viewers" = '2.09 million'
SELECT "Premiere" FROM "table_151" WHERE "HK viewers" = '2.09 million'