Do Want:
Mandy
I've loved cold-blooded assassin Mandy ever since she Mile-High-Clubbed a reporter for his press pass and then calmly dove out of the plane before blowing it up in the pilot, and that love has only grown over the years, whether she was plotting to assassinate David Palmer or kidnapping Secretary of Defense James Heller. She's an awesome, crazy bitch and I want her back.

Martha Logan
Hands-down the best player in Season 5, the finest season of the show. Her mental illness, her romance with Aaron Pierce, her suspicions of her husband's treason and the incredible scene in the finale in which she baits Charles into a secretly recorded confession were all 24 gold. With Samantha Who? canceled, maybe Jean Smart could come back and go crazy on somebody else with a knife. Olivia Taylor, maybe? Please?

Mike Doyle
Mike Doyle was a lot of fun -- a little crazy, a little torture-loving, well-read, very into racial profiling, surprisingly loyal at times and he had a short fuse. He was like a mini-Jack, and as such helped raise some of those show's biggest moral quandaries while Jack was off torturing his brother and learning that his entire family was evil for no reason. He was interesting, and who doesn't love Ricky Schroeder?

Collette Stenger
This was another great villain that the show didn't really have time to do a whole lot with on the jam-packed Day 5, and though I know Stana Katic is currently gainfully employed on another network, I'd still love to see this well-heeled French baddie back on CTU's radar at some point in the future.

Mike Novick
A generally stand-up guy, despite his misleading physical resemblance to Dick Cheney, Novick has a long history with the show, having served under both David Palmer and Charles Logan. He's always fascinated me because, either through the writing or the acting, I've always liked him despite some seriously boneheaded decisions (wanting to remove Palmer from office for not wanting to start a war over dodgy evidence and deciding to go ahead and blow up Martha Logan in a Russian limo, just to name a couple). If Charles and/or Martha come back, it would feel weird if Novick didn't as well; they're like the Three Stooges of covert plots and poorly kept state secrets.

Karen Hayes
I always liked Karen, even when she was brought in to be the by-the-books antagonist to CTU in Day 5, and now that Bill Buchanan is regretfully deceased, maybe she could be reinstated and act as Jack's new bureaucratic advocate this season. I'm also still not over Bill's death and would like to draw out everyone's mourning of him as long as humanly possible; her presence would facilitate that.

Don't Want:
Chase Edmunds
I don't really have a problem with Chase, per se -- Jack hacking off the guy's hand and throwing it in a freezer is one of the funniest things I've ever seen in my entire life. But bringing him back would just mean more Kim and more of him agonizing over her current unavailability -- and while I have made peace with Kim Bauer, I'd rather see her taking out hitmen in airport shoot-outs than crying over Chase any day.

Erin Driscoll
In Season 4 she fired Jack Bauer and ate up an awful lot of screentime stopping her fairly important work at CTU to take phone calls from her schizophrenic daughter b-plot. I never want to see that woman again.

Audrey Raines
If you haven't accepted by now that Jack Bauer is never going to lead a happy, contented life -- ever -- then you're probably too soft-hearted to be watching this show. Kim Raver is a fine actress, but I've had enough of Jack trying to be a man in love. It's fruitless, and I kind of love broken-down lone-wolf Jack even more than sappy dreamboat Jack. It just suits him better.

Sandra Palmer
Regina King is another very cool actress, but Sandra Palmer was one of the most grating, irritating nags in the show's history. What's that? You have personal moral agency and are less than averse to human rights, Sandra Palmer? Then this world is not made for you! I know we seem to be permanently done with all things Palmer, but I thought the same thing about the Logans, and King is out of a job right now. It may be tempting for God knows what reason, show, but resist!

The Cougar
If Kim must be on the show, that's fine -- let's just keep her away from the wilderness at all costs.

Who would you love and hate to see back? They have to be alive! Go forth and comment.