SELECT MIN("Episode #") FROM table_30117 WHERE "Viewers (millions)" = '4.03'
What is the lowest episode number that had 4.03 million viewers?
CREATE TABLE table_30117 (
    "Episode #" real,
    "Title" text,
    "Directed by" text,
    "Written by" text,
    "Originalairdate" text,
    "Viewers (millions)" text
)