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_17355820_1 ( original_air_date VARCHAR, directed_by VARCHAR )

### Question ###
On which dates did the episodes directed by TR Babu Subramaniam air?

### Accurate SQL ###

SELECT original_air_date FROM table_17355820_1 WHERE directed_by = "TR Babu Subramaniam"