for a long time this has been one of my favourite shows. Incredibly paced, great acting and most important, believable characters. Each season of the show is 24 episodes highlighting a continuous 24 hour span in the life of CTU (Counter Terrorist Unit) agent Jack Bauer. Bauer (Kiefer Sutherland) is an emotional actor who wears his heart on his sleeve. Sure he may at times be over the top (during interrogations) but that is part of the fun in the series.
At the conclusion of each episode they usually leave you with a scenario that always makes you want to watch just one more episode...damn cliffhangers ;)
Kiefer is backed up by a great/memorable cast of characters that you'll find yourself more drawn into with each passing episode. Dennis Haysbert, Elisha Cuthbert, Carlos Bernard, Xander Berkeley to name a few. The first few seasons of 24 were something really special (before the show slowly went off rails). It easily ranks up there with Lost season 1 & 2 as some of the best hours to ever be seen on television