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_22315 ( "No." real, "#" real, "Title" text, "Directed by" text, "Written by" text, "Canadian air date" text, "U.S. air date" text, "Production code" real, "Canadian viewers (million)" text )

### Question ###
Who wrote the episodes watched by 1.575 million people in Canada?

### Accurate SQL ###

SELECT "Written by" FROM table_22315 WHERE "Canadian viewers (million)" = '1.575'