This is embarassing because I am a 24 fan. ............... Where is the CTU located?
Regarding the previews, the movie serials were a big thing at all of the theaters in the 30's, 40's and 50's on Saturdays. Republic and Columbia made the most popular serials, but Columbia serials would preview the next week's chapter at the end of the current week's chapter and this ruined anticipation for the resolution of the cliffhanger. TV has picked up this bad habit with the current crop of tv serials. I am going to make it a point from now on to tune out when this week's "chapter" ends.