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[[folder: Fridge Brilliance ]]

* In ''Series/{{Eureka}}'''s "Once in a Lifetime", it seemed like a joke to have Zoey be valedictorian in a future that will never happen. But to be valedictorian, she had to smarter than a school full of geniuses; a subtle way to hint that Zoey is smarter than she gives herself credit for. We later learn this to be true when she scores a 157 on her IQ test, but tells her dad it was 112. How did Zoey end up with a super-genius level IQ with average parents? Well, that sort of thing ''can'' happen, but Jack mentions his IQ score was 111, which he was quite proud of because he didn't know it wasn't out of 100. However, he ''also'' mentions he "wasn't even trying". What sort of person can half-ass his way through a test and earn an average score without paying attention?
* When the finale version of Zoe and Jack passed the one in the Pilot, they were in the sheriff's jeep instead of Carter's car, with Zoe not waving at herself as the other one did in the pilot, but with the timeline change, this could have been the way it happened in the changed timeline all along.
* [[spoiler: If Henry and Grace]] were working with Beverly, that would explain why Beverly turned to them to help out with the Matrix incident. [[spoiler: Henry]] didn't know it, but at some point in the past, they'd worked together already.
* You know how [[spoiler:Henry's hatred of Jack for stopping him from using time travel to save Kim]] was apparently forgotten by the writers? In the episode "God is in the Details," Jack and Henry work together to stop the church pianist from using a dangerous device that she thinks will let her see her husband in the afterlife. Afterwards, Henry consoles the pianist, reminding her that their loved ones are in Heaven and they will be reunited with them soon. This is the point where [[spoiler:Henry forgives Jack]].
* Why didn't Jo and Zane hook up in the new timeline? We learn from Taggert that in the new timeline he proposed to Jo who shot him down, this means that Zoe never talked Jo out of dating him, so Jo was never free to be interested in Zane. Why? Because in this timeline we see that Zoe herself is attracted to older men, specifically Zane, and the age difference that was the original basis for her argument against Jo and Taggert dating would seem out of character in that context.

* Jack Carter is actually highly intelligent, he just does not apply that intelligence to gaining and using scientific knowledge. He instead is more focused on investigative work and problem solving. Notice how the problem of the week goes straight over his head until someone simplifies it for him, then its usually HIM to come up with a method of solving said problem even if he has no idea how to implement it(that is what the more scientific minded characters end up doing). One particular great example of this is the episode where Kevin slips some mental stimulants into Jack's coffee so Jack would not be looked down upon by Allison's brother. The first thing Jack does is read all of said brother's research and ends up coming up with methods that Allison's brother hadn't even considered. This unspoken facet to the character explains the early episode in which S.A.R.A.H. tried holding Jack hostage, claiming that there was enough data to suggest Eureka would fall apart without him(and Henry and a few others but it started with jack), He is smart enough to repeatedly figure out the Problems of the Week before more than a handful of people die, people who are reportedly invaluable to their fields of research.

* In The Ex-files each of the ones hallucinating had a specific person and reason for hallucinating due to unresolved issues each had to work through:
** Unlike Jack, Nathan was never shy about confessing his feelings for Allison.
** Tess was there for Allison both when her first husband died and shortly after Nathan died and represented her fear of Jack dying and her heart being broken a third time.
** Jo spent her whole time up to that point romanticizing her relationship with Other Zane and glossing over the negatives.
** Jessica Lansky represented Fargo's insecurities about his being suddenly the boss of GD and his frustration at not being able to stand up to General Mansfield.
** Adam Barlowe represented Trevor's disappointment at the military influence on Eureka and his own homesickness.

* Zane's proposal to Jo, and how it got erased in the new timeline and Jo's handwringing about if they were meant to be together and if they actually had something worth getting married over. When Jo (thinking she's talking to a hallucination) throws Zane's engagement ring back at him, Zane asks why Jo has his grandmother's ring, and afterwards begins relentlessly pursuing Jo and trying to figure out what they were to each other and what happened that he's totally unaware of it. Which all makes sense when you remember that's ''his grandmother's wedding ring''. It doesn't come up often, but family means a lot to Zane, and if he loved Jo enough to propose to her with his grandmother's ring, he loved her too much for a little disruption of the space-time continuum to get in the way.

* How did Jo become Head of GD Security in the new timeline? Remember in "Welcome Back, Carter" when she resigned in protest against working for an android? With Fargo as Director, and not dating Julia in this timeline, he probably offered her the job on the spot to keep her from taking a job elsewhere. By the time Carter was reinstated, she'd already changed jobs, so Andy stayed on as Deputy.

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[[folder: Fridge Horror ]]

* In the episode "Reprise", one of the songs seen being acted out in the background is Nena's "99 Red Balloons" which is very blatantly about nuclear annihilation. Eureka is a town where citizens can casually own antimatter. So the clean-up that got glossed over at the end of the episode probably involved stopping somebody from nuking Eureka. "I Melt With You" (the song that convinces Henry and Grace to build the stasis device to "stop the world" for each other) is also about nuclear annhilation, and Carter mentions "TheEndOfTheWorldAsWeKnowIt," stating that this is a town full of people who can make it happen. The episode runs mostly on IsntItIronic, but there were certainly a few people doing decidedly less harmless or amusing things because of their musical taste.

* Kim directly addresses the fridge horror inherent to the premise of "Before I Forget", noting that in addition to using the memory wiping device to steal scientific breakthroughs, her husband Jason could also have been using the device to erase her memories of a romance with Henry, cover up if he was caught having an affair, and even erase her memory of leaving him.
** There’s a lot more that goes unsaid. Did he ever beat her, then make her forget where the bruises came from? Did he replace a huge fight with a romantic dinner, getting her "in the mood" and effectively pulling a warped BedTrick? Did actually use a MaritalRapeLicense then erase it afterward? That kind of power in the hands of someone that selfish leads to all kinds of possibilities best left unsaid.

* Zane's plight in "Liftoff". Fargo brings him up on being three weeks late with the Ion Damper he was supposed to make for the test rocket, and when Zane does deliver the thing, he didn't make it himself as he said but stole it from the BCE. This is pretty out of character for Zane, who while irresponsible is usually pretty dedicated to his job; when asked to do some illegal hacking in "Stoned," he uses the opportunity to angle for new equipment rather than a personal bribe. Later, it becomes obvious what the problem is; he is ''freaking out'' over the fact that his memory has apparently been tampered with, to the point that he doesn't remember getting engaged.
** Worse, Jo notes at one point that Zane is "anti-anything that damages his brain," so having been apparently experimented on in this way taps straight into his worst fears. Remember his comment about being mind-controlled in his sleep "[leaving] a bad taste in my brain,"?
** He's in constant freakout mode and probably not sleeping; making high-tech gizmos is clearly out of the question. He needs answers to avoid getting fired from the job that's keeping him out of prison.

* By the end of "Double Take", most of the cast have been forcibly drugged and put into another matrix simulation. It's implied not to have been turned on yet, but most of them knew what was happening, e.g. Zane and Dr. Parrish. So... how are those people ever going to know for sure that they ''are'' out of the simulation? Isn't, "don't worry, you were rescued and are now in the real world" ''exactly what the matrix simulation would tell them'' so they don't try to escape? Not to mention that a bunch of them were on the Astreus crew, drop-kicking them straight in the existing trauma. The first thing Henry should do as Director of GD is hire an army of therapists to help a town full of people who will never be able to trust their reality again.

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[[folder: Fridge Logic ]]

* Taking the HistoricalInJoke to its logical conclusion, if the Einstein-Grant bridge became the Einstein-Rosen bridge after the timeline changed, then that means EVERYTHING prior to the Season 4 premiere occurs in an alternate universe to our own, and it is only now that history is put "right". It may never be significant, but it is an odd thought.

* The Matrix victims can exit the Matrix if they receive an intense electrical shock. Zane uses this to escape the Matrix and to help the rest of the Astraeus crew escape. In the real world, he can eject everyone, except Carter, who is plugged in at a different location. Any one of the escapees after Zane could have shocked Carter out of the Matrix, but instead they leave him to be saved by whoever is there at the Eureka IP address (an unconscious Henry and the duplicitous Beverly). Carter could have "shocked out" with minutes to go, but instead has to be ejected manually in the last few seconds before he dies.

* If [[AlternateSelf Alternate-Timeline Henry]] introduced Grace to [[spoiler:[[NebulousEvilOrganisation The Consortium]]]], why didn't the real Henry discover this when he and Grace shared memories?
** Maybe because she wasn’t thinking of it. It’s doubtful that the device could share all their memories, probably just the ones they wanted to, and Grace likely didn’t want Henry to know that.

* Considering in the new timeline, Kevin no longer has Autism and thus no longer possesses the unique connection to the Artifact that drove ''everything'' in the first two series, you have to wonder... what exactly ''happened'' to the Artifact in the new timeline?! Does it still even exist?!
** Forget the new timeline, what happened to the Artifact ''at all''? [[AbortedArc It's never even mentioned again after season two]], even though they still mention events that happened ''because'' of the Artifact (i.e. Kim's Death).
** From what I recall, it was mentioned once. Somebody mentioned that the Artifact's energies had dispersed and dissipated and that the item itself was in a sense ''dead''.
* When Beverly hijacks Allison's brain, she doesn't bat an eye at repeated mentions from the Founder's Day time travelers that she is becoming Director of Global Dynamics AGAIN, even though in this timeline, Fargo succeeded Stark instead of her.
** Because she already knew they were from an alternate timeline so was likely unfazed by any inconsistencies mentioned by them amongst themselves.

* Does the new timeline have two copies of Zane's grandmother's ring? Surely, Jo brought the one she has from the old timeline, and Grandma Donovan still has hers because Zane never wanted it to propose with?
** Probably, which was why Zane was so freaked out.