The whole hour is preparation for Jack's arrival at the terrorist compound and subsequent rescue of Heller and Audrey. But that doesn't mean it doesn't have its moments.
The Heller subplot itself is somewhat juiced up. Not by the gassing-self-to-death thing; I wasn't impressed by that, since it was predictable that they would survive. But Audrey recognizing the white guy with the terrorists—that's what makes things a little more interesting. As does the arrival of Heller's execution time and the beginning of the Internet broadcast. CTU finds the location of Omar's compound, but further raising the stakes are Keeler's order for a preliminary attack to kill Heller.
The other two big storylines are: Jack following Kalil to Heller, and Debbie's mother Karen looking for her at the Araz house. The latter is, as you might expect, funny as hell.
The boring stuff: Driscoll decides to fire Chloe instead of sending her to prison, and Marianne continues to bug Edgar.
I found it rather cheap that Kalil goes through the trouble of killing himself, yet Jack is able to find the compound rather easily. Oh well, who am I to gripe? If it leads to an awesome rescue sequence in the next episode, then lay it on me!
Hourly Highlight:
Kalil's suicide. Though I'm kinda disappointed with the absence of a big explos—Yay!