Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
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?
### Answer:
SELECT original_air_date FROM table_17355820_1 WHERE directed_by = "TR Babu Subramaniam"