SELECT MAX("No. in series") FROM table_1953 WHERE "Original air date" = 'February 8, 2004'
What episode number in the series aired on February 8, 2004?
CREATE TABLE table_1953 (
    "No. in series" real,
    "No. in season" real,
    "Title" text,
    "Directed by" text,
    "Written by" text,
    "Original air date" text,
    "Production code" text
)