When there are 12.70 million u.s. viewers who is the director?
CREATE TABLE table_1702 (
    "Series #" real,
    "Title" text,
    "Directed by" text,
    "Written by" text,
    "U.S. viewers (million)" text,
    "Original airdate" text,
    "Production Code" real
)
SELECT "Directed by" FROM table_1702 WHERE "U.S. viewers (million)" = '12.70'
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: When there are 12.70 million u.s. viewers who is the director? ### Input: CREATE TABLE table_1702 (
    "Series #" real,
    "Title" text,
    "Directed by" text,
    "Written by" text,
    "U.S. viewers (million)" text,
    "Original airdate" text,
    "Production Code" real
) ### Response: SELECT "Directed by" FROM table_1702 WHERE "U.S. viewers (million)" = '12.70'