It's been on the cards for awhile, but 24 alumnus Jon Cassar (director/producer for 7 seasons) has tweeted that the current eighth season will be its last:
"News from the 24 set,the crew has been told that 24 has come to an end. There will b no season 9. Its been a great run, thanx all 4 watching."This brings an end to one of the '00s most popular and pioneering television dramas, after an incredible nine years on-air. 24 is expected to move into feature films, having recently hired screenwriter Billy Ray to work on a script, rumoured to be set in Europe. There has been speculation that NBC may be interested in continuing the series on TV recently, but I don't hold out much hope for that.