How many episodes had 11.86 million US viewers?
CREATE TABLE table_28215780_4 (no_in_series VARCHAR, us_viewers__millions_ VARCHAR)
SELECT COUNT(no_in_series) FROM table_28215780_4 WHERE us_viewers__millions_ = "11.86"
### Context: CREATE TABLE table_28215780_4 (no_in_series VARCHAR, us_viewers__millions_ VARCHAR) ### Question: How many episodes had 11.86 million US viewers? ### Answer: SELECT COUNT(no_in_series) FROM table_28215780_4 WHERE us_viewers__millions_ = "11.86"