Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE table_21781578_2 (us_viewers__millions_ VARCHAR, directed_by VARCHAR, production_code VARCHAR)
### Question:
What was the number of US Viewers in the episode directed by Steve Shill and having a production code of E2102?
### Answer:
SELECT us_viewers__millions_ FROM table_21781578_2 WHERE directed_by = "Steve Shill" AND production_code = "E2102"