CREATE TABLE table_29978 ("No. in series" FLOAT, "No. in season" FLOAT, "Title" CLOB, "Directed by" CLOB, "Written by" CLOB, "Original air date" CLOB, "Production code" CLOB, "U.S. viewers  ( million ) " CLOB)

What was the production code of the episode with an audience of 14.79 million in the US?
SELECT "Production code" FROM table_29978 WHERE "U.S. viewers (million)" = '14.79'
SELECT "Production code" FROM "table_29978" WHERE "U.S. viewers (million)" = '14.79'