Oh, Alex Karev. If your wife wasn’t such a pain this season, I’d be really angry that (according to an interview Justin Chambers recently did with TV you have a one-night stand in the first post-hiatus episode of Grey’s Anatomy, which also happens to be the first part of the show’s crossover with Private Practice. But who does Alex get busy with in the Jan. 14 episode? Beats me. My crystal ball is buried beneath an avalanche of unopened mail. Enter new Ausiello Files contributor/Grey’s addict Sandra Gonzalez, who narrowed down the possible suspects to the following six women. Warning: The odds presented below are non-scientific, so don’t take ’em to Vegas. Foxwoods maybe, but not Vegas.

Reed (odds: 1-5): It makes sense that Karev would choose to work through his pain with the brash Mercy West-er, who has been undressing Alex with her eyes for weeks. But if Chambers’ claim (that the other woman’s identity will cause our heads to spin) proves true, it won’t be Reed. And if it is, Chambers hasn’t been watching his show very closely this season.

Lexie (odds: 1-2): They had a brief tryst in the past, so it stands to reason that Alex might once again play doctor with ‘lil Grey. And from Lexie’s perspective, what better distraction from all the McDaughter drama than another roll in the hay with a former Calvin Klein model?

Addison (odds: 3-1): It also wouldn’t be the first time Karev visited Le Bed Montgomery, but — as previously reported — Addison will have her hands full helping out Mark. And girlfriend has only so many hands.

Cristina (odds: 9-2): Should Hunt get busy with ex-love Teddy, Cristina might be out for a little revenge of her own. But why would she pick Alex when she’s already got another MD (i.e. Dr. Avery) ready, more than willing, and (we’re just assuming here) extremely able?

Meredith (odds: 7:1): Shonda Rhimes has said that Der-Mer’s upcoming troubles would be work-related, not personal. And we’re going to take her at her word.

Miranda (odds 15-1): Grey’s writers have been anything but subtle about Miranda’s rocky personal life. And Chambers did say the choice would shock people. Well, this would shock me!

Who do you think Karev will share a supply closet with when Grey’s returns? Sound off below!