LOS ANGELES —  The clock will keep ticking for FOX's "24" for at least two more seasons.

The series that tracks one eventful day in the life of counterterrorism agent Jack Bauer (Kiefer Sutherland) per TV season has been renewed through 2008-09, the network said.

The series, which won the best-drama Emmy last year, saw its ratings slip this season but remains a key part of FOX's schedule.

Producers have said they intend to make some changes for next year but will keep the show's daylong-crisis approach intact.

The FOX network is owned by News Corp., the parent company of FOXNews.com.