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_15431959_1 ( original_air_date VARCHAR, written_by VARCHAR )

### Question ###
What was the original air date of Stargate SG-1 written by Peter Deluise?

### Accurate SQL ###

SELECT original_air_date FROM table_15431959_1 WHERE written_by = "Peter DeLuise"