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

### Instruction:
How many episodes aired on 25 october 2012?

### Inputs:
table_name: table, columns: ['Episode no.', 'Airdate', 'Dave Viewers', 'Dave Rank', 'Rank (cable)', 'Dave ja vu Viewers', 'Total viewers']

### Response:
SELECT COUNT Total viewers FROM table WHERE Airdate = 25 October 2012