24 spin-off in development 

Last year Fox brought Jack Bauer back for a 12 episode mini-series set in London. A few months after that, they announced plans of a spin-off series, news quickly dried up. But now, according to online reports fox are working on a series that would star a younger male lead, with Jack Bauer showing up every few episodes. 
I’ll admit now, the whole 24 phenomenon passed me by. I didn’t see it until 24:live another day.
Personally, I think it’s a smart move. There’s a wider world within the CTU and by bringing in a new cast, the showrunners will be free to write some fresh stories without being restricted by Jack’s complicated history.