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_20349 ( "No. in series" real, "No. in season" real, "Title" text, "Directed by" text, "Written By" text, "Originalairdate" text, "TV Broadcast" text )

### Question ###
Who was the director of the episode 'graduation day: class of 2105'?

### Accurate SQL ###

SELECT "Directed by" FROM table_20349 WHERE "Title" = 'Graduation Day: Class of 2105'