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_2468961_8 (written_by VARCHAR, directed_by VARCHAR, original_air_date VARCHAR)

### Question ###
Name who wrote the episode directed by patrick duffy airing on november 7, 1997

### Accurate SQL ###

SELECT written_by FROM table_2468961_8 WHERE directed_by = "Patrick Duffy" AND original_air_date = "November 7, 1997"