The last time the world saw Jack Bauer, he had willingly turned himself over to the Russians at the end of 24: Live Another Day.
That said, late last year it was revealed the team was discussing a potential female-led legal thriller set within the show’s universe, so it’s also completely possible this new adventure could be devoid of Jack Bauer entirely.
The ending seemed to tease a new story that would show exactly that, and it’s possible this could be the new series the creative team is working on.
Bauer exchanged his freedom for the safety of his family but informed his captors that should they go back on their word he would tear their entire world apart.