Very good episode last night.
Renee's death, just after the long-awaited sex scene, was shocking, even if I was expecting it. Chloe as head of CTU is so wrong yet so logical that I presume the writers stunned themselves when it occurred to them. And Logan is in bed with the bad Russians, who are the real villains behind the IRK plot!
I like the idea of having an evil government behind the terrorists. I especially like that it's evil Russians, which brings us back into alignment with the geopolitical realities.
Many seasons of 24 started fast and then died off as the writers ran out of ideas (see seasons 1 and 3). This season, like season 4, started off slowly and then picked up steam all at once midway through the year.