24 take 2

Well, hours 3 and 4 weren't as compelling as hours 1 and 2, but here's what we got out of it:

• Tony's actually undercover, but still sort of a bad guy. I have to admit, not a huge surprise. (My mother emailed me yesterday to tell me she thought he was undercover.)
  
• The twitchy guy got fingered (and cleared, for now) as the mole. His wife on the plane? Blah. Reminds me of all the CTU relatives I never cared about (Edgar's mother, Adam's sister, Michelle's brother... Kim Bauer)
  
• I also don't really care about the First Son suicide thing. I think it's hard to drum up interest in a character we saw for about 10 minutes in Redemption and was killed off-screen.
  
• Jack and Tony are now both undercover. I'm enjoying the buddy cop-ness of them.
  
• Agent Walker has completed her transition to "Jill Bauer" and is gleefully torturing suspects.
• Bill and Chloe are back!!

Okay, I... kinda need a refresher on that one. What happened to Bill last season? I have a vague recollection that someone got arrested, but I can't remember if it was him or Karen. And if it wasn't Karen, where is she? (Wikipedia tells me that Karen was arrested, but she received a pardon in exchange for Bill resigning. So again I ask - where is she? They were my second favorite CTU couple, after Tony and Michelle.)