Who directed the episode that had 12.88 million viewers?
CREATE TABLE table_25923164_1 (
    directed_by VARCHAR,
    us_viewers__million_ VARCHAR
)
SELECT directed_by FROM table_25923164_1 WHERE us_viewers__million_ = "12.88"
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: Who directed the episode that had 12.88 million viewers? ### Input: CREATE TABLE table_25923164_1 (
    directed_by VARCHAR,
    us_viewers__million_ VARCHAR
) ### Response: SELECT directed_by FROM table_25923164_1 WHERE us_viewers__million_ = "12.88"