"Anyone still have the song 'Radioactive' stuck in their head from the pilot episode?"

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Note: Full spoilers for the episode follow.Whoa. So that happened.Let’s get out of the way that no, I don’t think they really initially sold us on Finn losing it in the way we’ve seen in the last few episodes. Bellamy explained it to Clarke in this episode more than we actually saw. Finn certainly didn’t seem to be any more affected in the season premiere than anyone else was by all they’d gone through. So yeah, it’s a leap that somewhere, off camera, really, Finn just snapped...…but it’s pretty damn riveting now that he has, right?Finn was easily my least favorite character in Season 1, but I’m certainly interested in his storyline now. The fact that Murphy (Murphy!) was trying to talk him down and stop this situation from escalating said it all. And while maybe you could guess Finn would kill one of the Grounders as things got heated, I didn’t see his mini massacre coming as he kept on shooting one innocent person after another. The way they played his reunion with Clarke, as he happily exclaimed, “I found you!” was perfect – the twisted icing on the cake (Mount Weather reference only partially intended) to show just how screwed up everything was.So yeah, it was a bit bumpy getting here, but I’ll take it. Because this is a really bold place to go – to take Finn, who was presented as the dreamy, flowing hair pacifist in Season 1 -- the guy with two girls both in love with him, including our lead character -- and make him into a crazed murderer who's lost his connection to reality.Before Finn went all the way into Joker territory, we got plenty of other good material as well. The emotional reunions Clarke got at the top of the hour were great. Her breaking down and crying with Abby was a very well-earned, cathartic moment, considering all she'd experienced – and wow, just how freaking beat up she looked as she was dragged in said it all. I love how, unlike many TV shows, they make sure that all the cuts and bruises these characters are getting don’t just magically vanish in-between scenes or episodes. Even after Clarke was cleaned up, she still showed her wounds.Meanwhile, it was very sweet to see Clarke and Bellamy reunited as well. It was apparent just how different things were between them after all they’d gone through and how much they genuinely respect each other and are on equal footing. (Yeah, yeah… I ship ‘em too! Unlike Finn and Clarke in Season 1, these two have plenty of chemistry!). The 100 is incredibly fast-paced show and hardly takes a breath. A part of me wishes Clarke could have stayed put at the camp for at least an episode, before disobeying her mom, but, well, plot (and Finn’s insanity) beckoned! And the fact that she and Bellamy already had a pack ready for Octavia was awesome, rather than bothering with any silly, "No, Octavia, it's too dangerous!" nonsense any longer. These characters have evolved.Abby slapping Raven was not so awesome… though Abby immediately showed she knew she’d gone too far. And yes, it makes sense that if you had just finally found your missing daughter, after crashing down from outer space and seeing most of your people die, and she then up and left, you’d be freaking out a bit. But don’t take it out on Raven, damn it!I was genuinely surprised when Jaha showed himself to Kane – after an amusing, growling fake out that implied there might be a rancor or some such down there in that pit. I will say though that it feels really unlikely that the desert wasteland we last saw Jaha in could possibly be close enough to where everyone else is for Jaha to already have been brought there. It was another, “Maybe this could have waited another episode…” moment. But I’d rather have a show moving a bit too quickly than too slowly, and The 100 certainly can’t be accused of the latter.Back in Mount Weather, we were fully in mad scientist land. Maya beginning to burn from radiation poisoning was yet another horrifying, shocking moment on a show that keeps on delivering on that front. Hopefully Jasper is finally really going to wake up to what’s happening, as Monty tried to be the “hey, none of this sounds right” guy again. While Monty still needs more of his own story, it was still a nice moment for him when he caught the suspicious phrasing used by Dr. Tsing and refused to leave.Meeting President Wallace’s son also added some new layers, as we saw his twisted tactics, that, presumably, are transforming Lincoln into a Reaper. The fact that Wallace truly didn’t want to experiment on the47, but his son pushed for it, added some intriguing shading to the situation as well. See, Dante is creepy and doing terrible things, but he still tried not to do all the creepy, terrible things!