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

### Instruction:
How many u.s. viewers  (million) have the production code of 5.09?

### Inputs:
table_name: table, columns: ['No.', '#', 'Title', 'Directed by', 'Written by', 'Original air date', 'Production code', 'U.S. viewers (million)']

### Response:
SELECT U.S. viewers (million) FROM table WHERE Production code = 5.09