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_19897294_11 ( no_in_season VARCHAR, no_in_series VARCHAR )

### Question ###
What episode in the season was episode us18 in the series?

### Accurate SQL ###

SELECT COUNT(no_in_season) FROM table_19897294_11 WHERE no_in_series = "US18"