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_26702204_1 ( us_viewers__million_ VARCHAR, production_code VARCHAR )

### Question ###
What was the u.s. viewers (millions) when the production code was 4alh19?

### Accurate SQL ###

SELECT us_viewers__million_ FROM table_26702204_1 WHERE production_code = "4ALH19"