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_18424435_3 (written_by VARCHAR, canadian_viewers__million_ VARCHAR)

### Question ###
Who wrote the episodes watched by 1.816 million people in Canada?

### Accurate SQL ###

SELECT written_by FROM table_18424435_3 WHERE canadian_viewers__million_ = "1.816"