That’s not Isaac.
- Isaac shut down unexpectedly, not at a point where his mission could be interpreted as “complete.” Instead, a fail-safe kicked in when he was becoming too close to the crew, and therefore compromised. The Kaylons reactivated his body with a different identity (get it?). This would explain his unexpectedly cold behavior: a generic farewell to the boys, an utterly inappropriate “speech” at the party, just discarding the drawing. All of this was OOC. When Dr. Finn said “I don’t know you,” she was being more literal than she realized. The “real” Isaac has been downloaded somewhere.
- He may even have downloaded himself into the Orville, since we know he can do that, and triggered the shutdown himself, once he realized his mission was no longer compatable with the relationships he has made. That would also explain why the Orville’s arrival at Kaylon was unexpected; that wouldn’t have been the case if it was part of his intended mission.
Isaac is a Double Agent.
- From the moment he's reactivated, he subtly orchestrates the events on and around the Orville. He drops the drawing right in the middle of the corridor, where Ty was sure to notice it (Isaac has studied the boys through and through, he understands their psychological profiles better than that of any other humans); when Ty sets out to find him, he makes sure he gets through all the safeguards that should have been in place (a laughably simple task for Isaac and even Kaylons in general, as demonstrated by the ease they board the Orville near the end of the episode), then opens for him the hatch that leads to the underground burial chamber, alerting the Orville crew to the Kaylons' secret and thus forcing Kaylon Primary to early action. When Claire confronts him about whether he thinks biological life is worth preserving, he remains silent, thus avoiding both lying to her and blowing his cover. (He's also technically truthful when he reveals his true mission: he never says he's still committed to it). Finally, with the Kaylon invading force aboard the Orville, he takes up his old station: he's now in a perfect position to sabotage the Kaylon invasion from within. Sure, this makes Isaac indirectly responsible for the high body count aboard the Orville, but that is arguably the lesser of two evils (and thus perfectly in character for Isaac): in all probability the Orville would have been boarded anyway, with the crew being none the wiser to the situation, and Isaac out of the loop, or even permanently deactivated.
- Confirmed. Isaac turns on his fellow Kaylon the moment he's given the order to kill a human being directly.
Yaphit has hidden himself in some inaccessible part of the ship.
- Norm Macdonald was credited in the episode but I don’t recall seeing Yaphit actually appear. Perhaps he will play a role in retaking the ship (the revenge motive on Isaac for “stealing” Claire doesn’t hurt either).
- He plays a large role in retaking the ship, though it's not really clear if he was actually hiding anywhere.
Roots had the opposite effect Kaylon Prime expected.
- Kaylon prime gave Issac the text in order for him to understand the brutality humans can inflict on each other, but the book may have resulted in Issac receiving sympathy for his fellow human and other organics, especially considering that the woman who loves him and her children are African American.
