The bonus twelve episodes of 24: Live Another Day in 2014 seemed no less intense, even if the production schedule was shorter.
The original run of 24 lasted for eight seasons, starting in November of 2001 and not coming to an end until May of 2010.
No wonder that he went through a sort of withdrawal when he had to face life and work without them.
Sutherland went on during his stop by The Jess Cagle Interview (via EW) to explain that the whole 24 family went through weddings and births and milestones together during the run of the show.