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

### Instruction:
what episode number had 11.73 million viewers?

### Inputs:
table_name: table, columns: ['Episode', 'First Air Date', 'Rating (18–49)', 'Share (18–49)', 'Viewers (millions)', 'Rank (timeslot)', 'Rank (night)']

### Response:
SELECT Episode FROM table WHERE Viewers (millions) = 11.73