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_30368 ( "No. in series" real, "Title" text, "Directed by" text, "Written by" text, "Original air date" text, "Production code" real )

### Question ###
How many different titles does the episode originally aired on September 27, 1984 have?

### Accurate SQL ###

SELECT COUNT("Title") FROM table_30368 WHERE "Original air date" = 'September 27, 1984'