Below is an instruction that describes a task. Write a response that appropriately completes the request.

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

### Inputs:
table_name: table, columns: ['Series #', 'Season #', 'Title', 'Directed by', 'Written by', 'Original air date']

### Response:
SELECT Original air date FROM table WHERE Directed by = TR Babu Subramaniam