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_74141 ( "#" real, "No." real, "Title" text, "Directed by" text, "Written by" text, "Viewers" real, "Original airdate" text, "Prod. code" real )

### Question ###
what is the total number of films directy and written by john callaghan?

### Accurate SQL ###

SELECT COUNT("Directed by") FROM table_74141 WHERE "Written by" = 'John Callaghan'