What was the original air date of the episode that had 5.42 million viewers?
CREATE TABLE table_27790959_1 (
    original_air_date VARCHAR,
    us_viewers__million_ VARCHAR
)
SELECT original_air_date FROM table_27790959_1 WHERE us_viewers__million_ = "5.42"
Below are sql tables schemas paired with instruction that describes a task. Using valid SQLite, write a response that appropriately completes the request for the provided tables. ### Instruction: What was the original air date of the episode that had 5.42 million viewers? ### Input: CREATE TABLE table_27790959_1 (
    original_air_date VARCHAR,
    us_viewers__million_ VARCHAR
) ### Response: SELECT original_air_date FROM table_27790959_1 WHERE us_viewers__million_ = "5.42"