CREATE TABLE table_74248 ("\\u2116" FLOAT, "#" FLOAT, "Title" CLOB, "Directed by" CLOB, "Written by" CLOB, "Original air date" CLOB, "Production code" CLOB, "U.S. viewers  ( millions ) " CLOB)

What is the production code for the episode with 5.5 million u.s. viewers?
SELECT "Production code" FROM table_74248 WHERE "U.S. viewers (millions)" = '5.5'
SELECT "Production code" FROM "table_74248" WHERE "U.S. viewers (millions)" = '5.5'