Name the msot episode that was adapted by leon griffiths
CREATE TABLE table_1318 (
    "Episode" real,
    "Title" text,
    "Story" text,
    "Adapted by" text,
    "Director" text,
    "Airdate" text,
    "Exists?" text
)
SELECT MAX("Episode") FROM table_1318 WHERE "Adapted by" = 'Leon Griffiths'
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: Name the msot episode that was adapted by leon griffiths ### Input: CREATE TABLE table_1318 (
    "Episode" real,
    "Title" text,
    "Story" text,
    "Adapted by" text,
    "Director" text,
    "Airdate" text,
    "Exists?" text
) ### Response: SELECT MAX("Episode") FROM table_1318 WHERE "Adapted by" = 'Leon Griffiths'