How many episodes aired on 25 october 2012?
CREATE TABLE table_25721_3 (total_viewers VARCHAR, airdate VARCHAR)
SELECT COUNT(total_viewers) FROM table_25721_3 WHERE airdate = "25 October 2012"
### Context: CREATE TABLE table_25721_3 (total_viewers VARCHAR, airdate VARCHAR) ### Question: How many episodes aired on 25 october 2012? ### Answer: SELECT COUNT(total_viewers) FROM table_25721_3 WHERE airdate = "25 October 2012"