What is the production code for the episode with 5.5 million u.s. viewers?
CREATE TABLE table_28195898_1 (production_code VARCHAR, us_viewers__millions_ VARCHAR)
SELECT production_code FROM table_28195898_1 WHERE us_viewers__millions_ = "5.5"
### Context: CREATE TABLE table_28195898_1 (production_code VARCHAR, us_viewers__millions_ VARCHAR) ### Question: What is the production code for the episode with 5.5 million u.s. viewers? ### Answer: SELECT production_code FROM table_28195898_1 WHERE us_viewers__millions_ = "5.5"