Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_30457 ( "Series #" real, "Title" text, "Written by" text, "Directed by" text, "Original air date" text, "Production code" text, "U.S. viewers (millions)" text )

### Question ###
How many million u.s. viewers watched the episode with a production code of 2t7004?

### Accurate SQL ###

SELECT "U.S. viewers (millions)" FROM table_30457 WHERE "Production code" = '2T7004'