For the first-season cast, Noah Bean, who was cast as David, said he "gave an awful first audition" but managed to get the part when given a second chance while waiting for an elevator. When British actor Anastasia Griffith auditioned for the part of Katie Connor, the producers were hesitant to have a British actor play an American, especially since they already had an Australian (Byrne) playing an American. However, Griffith convinced the producers by speaking in an American accent throughout their follow-up meeting. At the time of casting, Griffith's role was intended only for three episodes, but it was extended after the producers realized the character's success. Željko Ivanek scored the initially very minor role of Ray Fiske through an audition, but as producers watched Ivanek's work in the dailies, they beefed up the role considerably.