What's the original airdate of the episode directed by Pete Travis?
CREATE TABLE table_17868 (
    "#" real,
    "Episode" text,
    "Writer" text,
    "Director" text,
    "Viewers(millions)" text,
    "Original airdate" text
)
SELECT "Original airdate" FROM table_17868 WHERE "Director" = 'Pete Travis'
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: What's the original airdate of the episode directed by Pete Travis? ### Input: CREATE TABLE table_17868 (
    "#" real,
    "Episode" text,
    "Writer" text,
    "Director" text,
    "Viewers(millions)" text,
    "Original airdate" text
) ### Response: SELECT "Original airdate" FROM table_17868 WHERE "Director" = 'Pete Travis'