CREATE TABLE table_17641206_8 (directed_by VARCHAR(255), written_by VARCHAR(255), original_airdate VARCHAR(255))
What are the movies that are written and dircted by  john sullivan  with the airdate of 15january2009.
    
SQL: SELECT directed_by FROM table_17641206_8 WHERE written_by = "John Sullivan" AND original_airdate = "15January2009"