It's confirmed that Romon's brother has worked a transaction in which a deadly virus has been transported, through a big bag of cocaine, to Los Angeles. We know who has the bag and is giving it to someone else for cash. In other words, he - "Kyle Singer" (Riley Smith) - was just being the messenger boy. In this episode, Bauer and younger partner Chase Edmuunds (James Badge Dale) find out about Singer and they try to locate him.
We also get a short subplot in which Jack's daughter Kim (Elisha Cuthbert) and Chase tell the boss that they are getting seriously involved, which does not please him. Apparently, he has made it known that no one in their job with the CTU can successfully maintain a marriage and he doesn't want his daughter to suffer. Anyway, that's just another angle to give the viewers a break from the tense terrorist situation.
This is another good episode and now has me hooked. This is my first go-around on this program and I can see why it's successful. The characters are all interesting, including Denis Haysbert as the President. He has since gone on to star in his own TV program ("The Unit"), so I'm curious to what happens to him on this show.