Jo is back at Henry's garage, where he has finally come up with a use for all three of the stolen items: they're all used in experiments on DNA manipulation. So the out-of-character Jo was not Jo at all, but someone who manipulated her DNA to look like Jo. I think. [Then why were they still stealing stuff when they already looked like Jo? - Z] Henry rather insultingly asks who would want Jo's DNA with all of the awesome Eureka DNA to choose from. Jo has a pretty good idea: "someone who thinks I'm perfect." So that rules out Zane.
A worried Jo works in a GD lab. She goes over some calculations before turning around to see the real Jo standing in front of her. Uh oh. The real Jo is not happy. She's figured out that the imposter is Julia. "Please don't be mad!" Julia says pathetically. There's a lot of belief to suspend here, but I'm just happy to see two Jos this week. There's never enough Jo usually, and this episode is just an embarrassment of riches! Julia says she just wanted to be Jo for one day. Well, that's a lot of work to be a sheriff's deputy for one stupid day. Julia says that Jo is beautiful, confident, and has everyone's respect. Jo will agree with the confidence and respect parts, but isn't so sure about the beauty, which kind of negates the confidence part as well. Then Julia reveals the real reason why she wants to be Jo: because she's in love with Fargo and he's in love with Jo. Jo orders her to go back to her original Julia form, but Julia sobs that she can't -- something about "the DNA-based strands" destabilizing and her being unable to reverse the process. Well, no shit, Julia. That's what happens when you mess with things like this and don't bother to test it on animals first. I have no sympathy, and neither does Jo, who threatens to arrest Julia, at which point Julia's pathetic whimpering turns sinister as she pushes a button and Jo doubles over. It turns out that those pills Julia gave Jo in the beginning of the episode were remote time-release sedatives, and Julia just pushed the remote. I'm also going to assume she pushed that remote last night, so way to make double-action remote time-release sedatives that can't be crapped out or dissolve in the stomach, GD scientists!! Anyway, Jo falls unconscious for like the third time this episode. Just before she's down for the count, Julia apologizes once more and says that if she has to choose between being Julia and Jo, she chooses Jo. Well, it's always nice to be admired.