CREATE TABLE table_30089 ("No. in series" FLOAT, "Title" CLOB, "Directed by" CLOB, "Written by" CLOB, "Original air date" CLOB, "U.S. viewers  ( millions ) " CLOB)

What date did the episode with 8.28 million u.s. viewers originally air?
SELECT "Original air date" FROM table_30089 WHERE "U.S. viewers (millions)" = '8.28'
SELECT "Original air date" FROM "table_30089" WHERE "U.S. viewers (millions)" = '8.28'