List all directors when Brad Radnitz was the writer?
CREATE TABLE table_26054 (
    "Episode #" real,
    "Season #" real,
    "Title" text,
    "Directed by" text,
    "Written by" text,
    "Original airdate" text,
    "Production code #" real
)
SELECT "Directed by" FROM table_26054 WHERE "Written by" = 'Brad Radnitz'
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: List all directors when Brad Radnitz was the writer? ### Input: CREATE TABLE table_26054 (
    "Episode #" real,
    "Season #" real,
    "Title" text,
    "Directed by" text,
    "Written by" text,
    "Original airdate" text,
    "Production code #" real
) ### Response: SELECT "Directed by" FROM table_26054 WHERE "Written by" = 'Brad Radnitz'