The pilot of the series was well received by critics , and was signed on for an initial thirteen episodes . Production began in July 2001 , and the premiere was planned for October 30 , but because of the September 11 attacks , delayed until November 6 . After the first three episodes , Fox greenlit the remaining filmed 11 episodes and following Kiefer Sutherland 's Golden Globe win , Fox ordered the second half of the season
September 11 attacks
September 11 attacks
24 (TV series)