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

### Instruction:
When did the episode title "Duet For One" air?

### Inputs:
table_name: table, columns: ['No. in series', 'No. in season', 'Title', 'Director', 'Writer(s)', 'Original air date', 'Production code']

### Response:
SELECT Original air date FROM table WHERE Title = "Duet for One"