In the pilot, we see that the Serpent Brotherhood sent people to assassinate both Flynn and Ezekiel, but we never see them try to take out Cassandra. Why is that? Probably because she had already agreed to help them.
Some fans have asked why at the end of "And the Heart of Darkness", Cassandra didn't use the house's magic to cure her tumour. The answer lies in the name: House of Refuge. The greatest displays of beneficial magic it shows are manifesting ice packs and Xboxes. While impressive, this is far from being able to cure a deadly disease. The house was built to comfort those in need, and no matter how comfortable Cassandra is, she will still have her brain grape. Clearly, it couldn't even cure Eve's black eye, let alone perform literal brain surgery.
It seems somewhat out of character for Jenkins to get so concerned when he learns that the LITs have lost Baird in "And the City of Light", until the end of the season when you realize that she's the linchpin in his Batman Gambit against Dulaque.
And/or it can show that he's beginning to care about the team.
In his first appearance, Jenkins states that wounds caused by Excalibur can't be healed, and seems very engaged with Flynn's discussion of Excalibur's purpose and the Stone Excalibur was pulled from. At first viewers might put this down to simply his Librarian knowledge... but by the end of the season, it's clear there's another reason he would be so familiar with this particular topic.
And his skill with a sword, even though it's been centuries? Well, for all we know, he may well have also sparred with Excalibur every once in a while, as well as possibly sparring with Librarians of the day once in a while and maybe Charlene and Judson. A few hours a week over almost 1,500 years does tend to add up...
At the beginning of the series, the LI Ts warn Jenkins that Eve "can and will kick [his] ass" if he doesn't comply, and he gives in immediately. After learning about his true identity (and just how dangerous he can be when pushed), his capitulating seems less like not wanting to get beat up, and more out of genuine respect for the Guardian's will.
In "And The Apple of Discord," why does Jenkins say to Dulaque "When we stopped being...whatever we were..." instead of father and son? According to the myths, Galahad was raised by his maternal grandfather, and didn't meet Lancelot until he was a young man. While Lancelot was his biological father, he wouldn't have been Jenkins' primary parental figure. Meanwhile, Lancelot was tricked into sleeping with the woman who would become Galahad's mom, betrayed King Arthur, and was indirectly responsible for the fall of Camelot. Not only that, but when Galahad arrived at Camelot, he overshadowed his father—he's generally considered to be the best swordsman of all the Knights, the only person to ever beat Lancelot in a fair fight, not to mention being the purest, most worthy of the Grail, etc. So it's likely they wouldn't have been on good terms even then.
Dulaque and Lamia are a part of the Serpent Brotherhood. So, when they board the cargo plane carrying the LITs and Santa, what do the group have to deal with? Snakes on a Plane!
Somewhat between fridge brilliance and horror, in "And the Apple of Discord" Cassandra tries to blow up a power plant because "practical application is more fun than theory". Although it's easy to chalk this up to the apple making her a Mad Mathematician, none of the others go quite to murderous lengths. So where is this coming from? Well, it may stem from her brain grape and imminent death. If she's going to die, she figures she might as well take everyone with her. Or at least as many people as she can.
This also makes sense in that it makes a person "the worst version of herself". Cassandra's pain and suffering could eventually overcome her compassion. But Ezekiel is ALREADY such a jerk that any changes would be relatively minor. Any attempt at negative circumstances would break his ego...leading to potentially positive results!
Ezekiel also accepts that he's not a great guy. He's pretty much at peace with that, albeit working to become a better person. For all the others, though, their dark sides are repressed, and they've not had to deal with them before.
The shapeshifter in "And What Lies Beneath The Stones" claims that Stone will be unable to hurt his friends, and Stone disagrees and punches it out...but only when it's in Ezekiel's form. He does notably hesitate to hit it when it looks like Cassandra!
The title of "And the Point of Salvation" seems rather odd until you remember two things: the definition of salvation is "preservation or deliverance from harm, ruin, or loss", and the episode takes place in a video game. The point of salvation is a SAVE POINT.
It's never stated where the government picked up the Atlantean Thaumatite which caused the "video game" loop. However, given that we know DOSA has a bad habit of picking up magical items without fully understanding what they're doing, it's a pretty safe bet they were responsible.
Jenkins states that he went through a nasty mid-life identity crisis during the Elizabethan era. What could have caused this? Well, part of it at least might be due to the fact that Le Morte d'Arthur was published in the late fifteenth century. Assuming it took the guy who's mostly a hermit a few decades or so to get around to reading it, it would make sense that that book stirred up lots of painful old memories.
Throughout "and the Reunion of Evil," Eve shows a lot of faith in Ezekiel, much more than Jenkins does. It's worth bearing in mind that she has the memories of the end of "and the Point of Salvation," knowing that when the chips are down, he is willing to sacrifice himself for the team. In other words, she's already seen the best version of him, she's just trying to bring it out again.
"And the Self-Fulfilling Prophecy" has a scene where Eve, Stone, and Jones all attack each other just because of a prophetic vision saying they would. It seems a bit weird that they'd be willing to do this just on the strength of a vision, but given how many shapeshifters and illusionists they've dealt with already, the implication is pretty clear that both groups think the other isn't really them.
In The Librarians S3 E06 "and the Trial of the Triangle" Flynn uses hypnosis to herd airplane passengers through the plane door into the Library without inducing panic nor the truth about magic before the plane flies into the Bermuda Triangle. Only, he ends up making them all think that they're pigs. The chances of him still getting them all out? When pigs fly...
The plan in "The Wrath of Chaos" seems like it has a lot of moving parts, but the brilliant thing is that it was far better planned than one might realize. As Eve notes, sending the Librarians to rescue Jenkins would ensure that the four of them are available even if things don't work out for Eve and Flynn. Had Apep not possessed the head of DOSA, they could have dealt with them and then locked up the casket somewhere. Eve giving DOSA Medusa's head allows them to capture Jenkins without either hurting him or any of the DOSA soldiers, but also built trust between her and the General. And so on.
The three trials Jenkins and the gang have to get through in "Some Dude Named Jeff" seem oddly specifically tailored to the party. However, that's the point—the Library wants Jenkins to get back in, and therefore modified the tasks to ones each of them could accomplish. Jenkins himself hints at this when he states that the chambers modify themselves based on who is trying to get in.
Learning that the Guardian's primary responsibility is to keep the Librarians on the straight-and-narrow makes Nicole Noone's tenure as Edward Wilde's Guardian a complete and utter failure, in addition to the complete betrayal he pulled on her. It probably contributed to her quitting the post and leaving Flynn after the events of the first movie.
And what's worse? Edward Wilde is mentioned, specifically, though not by name.
And then Season 4 reveals that she actually didn't quit; ohno...
Thanks to the Cosmic Retcon at the end of Season 4, pretty much everything we saw in Season 4 ended up not happening. This means that Fortuna and Santa's evil brother are still out there causing chaos, people are still trapped in trees at the team-building camp, Havenport is still under the control of a fairy, etc. And did Darrington Dare die at age 40 or was he unaffected by the retcon? The silver lining is that Flynn and Eve remember everything that happened, which means they can help the other Librarians sort things out a lot faster this time.
It helps when you realize that the main thing that lead to the necessity of the retcon, were Flynn and Eve being unwilling to go through the ritual, Jenkins losing his immortality, and Flynn disappearing...none of which will happen in the changed timeline. Additionally, since Eve seems to have retained those memories, she'll very likely be able to guide the team to work things out.
