Well, it looks like 2010 is just not Eureka's year. First they have time-storms, then they have... another time thingy, and now the whole show has gone upside-downy. If Carter ever gets his memory restored, that means he'll have seen three distinct versions of the year. Henry might've seen a fourth. It's been a while since I saw the season one finale, so I don't remember if he mentioned how long it was after Kim died before he went back in time and (almost) saved her.
The premise was fun, and I wanted to read Bear's blog about this episode as soon as I heard the 40s-style opening credits arrangement. Some of the regular science was a little screwy (I'm fairly sure defibrillation doesn't work that way, but they did have Allison doing the new CPR procedure that was rolled out after it was found that the mouth-to-mouth doesn't help and you get more air into the body just doing the chest compressions. And I honestly just don't want to look up if wet magnesium actually burns hotter than dry, but that seems... suspicious), though there was one bit of science I quite liked, even if I'm fairly sure it was unintentional. Dr. Grant and his amazing wandering accent mentioned that it was easier than you'd think to launch a satellite ten years before Sputnik without anyone knowing. In point of fact, the U.S. could've put an object in orbit before Sputnik was launched, and nearly did so more than once. TPTB were nervous about the implications of launching an object into space, though, so they weighted the nose cones of their test rockets so none of them would actually achieve orbit.
Of course, there's a bit of difference between putting a lunchbox in LEO and having a solar relay in a geostationary orbit, but it's the thought that counts.
I was more than a little surprised that the Fargo-As-Terminator bit was actually in the episode. I thought that was just one of those fun bits they do for commercials, like the Mr. Rogers riff.