Who directed episode number 18 in the series?
CREATE TABLE table_25668962_1 (
    directed_by VARCHAR,
    no_in_series VARCHAR
)
SELECT directed_by FROM table_25668962_1 WHERE no_in_series = 18
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 episode number 18 in the series? ### Input: CREATE TABLE table_25668962_1 (
    directed_by VARCHAR,
    no_in_series VARCHAR
) ### Response: SELECT directed_by FROM table_25668962_1 WHERE no_in_series = 18