Rule of the Kestrels

So yeah, Peter is Zander's brother. This has been planned since Season 1, and its introduction was the initial reason Season 1 was expanded to 12 episodes. (The two episodes added both added a background to Zander and introduced the Finch Clan. If you'll remember, "Walking Dead" was a pretty weak episode. But its purpose was simply to introduce Khryos so he could appear in Season 2 and tell Peter the truth. And seeing as Eileen didn't kill yet, it would be a good show of her powers without going too far. (SEE: Daniel Stoneman) But other than that, Peter and Zander being brothers has had many hints throughout the series. The biggest clue was a seemingly innocent mention of a recently deceased "Chaingun Nikfort" by Genna in "Major Leagues". Considering the setting, and that Zander famously used a chaingun to ward off Stoneman attackers, it could be assumed that this was Zander she was referring to. So, Zander's last name would have to be Nikfort. Later on, Peter mentions having a brother and needing to find hims several times, and his description most definitely lines up with what we know about Zander. Another clue was Peter's relationship with Adrian, and later Jett, in which he very much acted as a "little brother." From here, we can infer that Peter's brother is older, and would be somewhat similar to Adrian and Jett (which Zander definitely was). Ironically, all these clues flew right over Adrian's head because he was trying to get ass. (Genna and then Tori) The revelation at the end is the "beast"

So yes, Adrian is finally dead. This has been planned for a while. The episode where he finishes of the Finch Clan but forget Khryos was called "Walking Dead" because that episode sealed Adrian's fate. Peter basically was set up to be the Trigger, or Dan of the show. But I wanted to take a different approach. Peter is similar to Dan, though his relationship to the main characters is more similar to Trigger. I wanted Peter's role in the story to be one that could not be seen coming. As such, he was introduced similar to characters that are killed off quickly. I wanted him to appear as a comic relief provider with a short shelf-life. As such, Tori was made to seem more important, and Peter was pushed to the back. And even once he was revealed to be more important, I set it up to seem as though Peter was exiting the show after "Masquerade". And I didn't want to drag out the revenge story too long. Therefore, I introduced the plot in one episode, then killed Adrian in the next. Adrian's death this season was probably bit predictable, so I tried to get a little more of a shock by killing him before the long-awaited final battle. Adrian didn't need more time in the plot to feel sorry; he'd done enough of that in his scenes with Eileen.

I decided pretty early on that Adrian would die, but how exactly came later. In one version, Eileen would be about to die for some reason but Adrian would take her place. In another, he'd sacrifice himself for the mission and would have a "Reichenbach Fall" goodbye. I also thought about having him slowly dying so he'd have a chance to redeem himself in the finale. But for whatever reason, this ending for his character just felt the most right. It acknowledged how much he had changed but also highlighted how unforgivable his crimes were and that he didn't deserve to walk away from this, or to emerge as some kind of hero.