Following the September 11, 2001 attacks, the start of the third season was postponed for a week, as were most American television premieres that year. A script for a special episode was quickly written and began filming on September 21. The episode "Isaac and Ishmael" aired on October 3 and addresses the sobering reality of terrorism in America and the wider world, albeit with no specific reference to September 11. While "Isaac and Ishmael" received mixed critical reviews, it illustrated the show's flexibility in addressing current events. The cast of the show state during the opening of the episode that it is not part of "The West Wing" continuity.