Literally could have stopped about 45 minutes into the season and claimed success. They crashed a train, stole an override device that could make nuclear power plants melt down all over the country. Mission Accomplished! Nope, after like a dozen OTHER distractions (like kidnapping the SecDef, setting off an EMP in LA, stealing a fighter jet, shooting down Air Force One and gravely injuring the POTUS, firefight in the Chinese Embassy), the end goal was to fire a nuclear missile at LA. Success in every previous plan was required for that one to work, and it would have been less devastating than just focusing on having success with the meltdown device in the first place. *sigh*
And they did all that in 24 hours? Sheesh.
I gave up on 24 after less than 3 episodes due to the violence and torture porn, but I think that, in principle, it could've worked well if they'd done it as a seasonal anthology. Instead of having the same guy improbably deal with multiple different 24-hour nonstop terrorism crises in the course of his life, focus each season on a different lead in a different profession, dealing with a different 24-hour crisis. One season is about a federal agent stopping a terror plot; the next is maybe about cops trying to find a kidnap victim with a 24-hour deadline; the next is maybe 24 hours in the ER after a train wreck or natural disaster; and maybe the next is a lawyer dealing with the old standby plot of having 24 hours to save their wrongly convicted client from execution. (The '90 Flash series did an episode like that, except it was only one hour, naturally.) And so on like that.