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_21729 ( "Series #" real, "Episode #" real, "Title" text, "Directed by" text, "Written by" text, "U.S. viewers (million)" text, "Original airdate" text, "Production Code" text )

### Question ###
What is the production code of the episode 'The Night Moves', which was directed by Patrick Norris?

### Accurate SQL ###

SELECT "Production Code" FROM table_21729 WHERE "Directed by" = 'Patrick Norris' AND "Title" = 'The Night Moves'