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_2170969_2 ( network VARCHAR, viewers_in_millions VARCHAR )

### Question ###
What network garnered 2.74 million viewers for Supernatural?

### Accurate SQL ###

SELECT network FROM table_2170969_2 WHERE viewers_in_millions = "2.74"