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_18646432_4 (title VARCHAR, original_air_date VARCHAR)

### Question ###
What is the name of the episode originally aired on September 29, 1999?

### Accurate SQL ###

SELECT title FROM table_18646432_4 WHERE original_air_date = "September 29, 1999"