No surprise that Valentine's Day isn't all that great for Liz Lemon on '30 Rock' (Thurs., 9:30PM ET on NBC). She celebrates by having a root canal. But lo and behold, three of her former boyfriends show up in her hallucinatory anesthesia haze.

Oh well. Even if they weren't the real deal, at least we got our Jon Hamm fix, since 'Mad Men' won't be back until lord knows when (hopefully, July or August).

Watch the video after the jump.

That's got to be one of the worst things that can happen to a television actor. You get cast in a pilot. Things go well. Even better, the pilot gets picked up. You're going to series! Then you get the phone call. "We're recasting. It's not the series, it's you." And just like that, the show goes on without you.

Dean Winters is the latest victim, losing a lead role at that. ABC has cast Steven Weber in Happy Town, replacing Winters as John Haplin, one of the most powerful men in a town named after his family. It's an interesting replacement because Winters and Weber tend to put different spins on the same kind of guy. Weber can nail rich, powerful and important better than Winters, while the latter does intense and brooding, but much more street level.

With seven separate nominations in the Guest Actor and Actress categories, it's hard to believe that any 30 Rock guest stars were left off this year's list. The men nearly swept the nominees list for Guest Actor in a Comedy Series, earning four of the five available spots. The ladies made up half of the Guest Actress category; not bad!

Still, a few brilliant and hilarious performances were left out. You can't argue with nominations for Will Arnett and Elaine Stritch, but I'd swap one or two of the nominees with a few of my own favorites. Check out my list of overlooked 30 Rock guest stars after the jump. And yes, I left out Jerry Seinfeld. Emmy got that one right.