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_28725 ( "No." real, "#" real, "Title" text, "Directed by" text, "Written by" text, "U.S. air date" text, "Production code" text, "U.S. viewers (million)" text )

### Question ###
How many million U.S. viewers watched the episode with the production code 3x6004?

### Accurate SQL ###

SELECT "U.S. viewers (million)" FROM table_28725 WHERE "Production code" = '3X6004'