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_25127 ( "Series #" real, "Season #" real, "Episode title" text, "Written by" text, "Directed by" text, "U.S. viewers (millions)" text, "Original air date" text )

### Question ###
Who is the written by when mark worthington is the director?

### Accurate SQL ###

SELECT "Written by" FROM table_25127 WHERE "Directed by" = 'Mark Worthington'