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

### Instruction:
what is the original air date of the episode no in season 9?

### Inputs:
table_name: table, columns: ['No. in series', 'No. in season', 'Title', 'Directed by', 'Written by', 'Original air date']

### Response:
SELECT Original air date FROM table WHERE No. in season = 9