Bellamy is inside! Too bad that Lincoln had a change of heart and now poor Bellamy is a prisoner. Will he able to get free and help the others? And how about president Wallace? He seems reluctant to use the kids from the Ark. Will he discover what his son and Dr. Tsing are doing? Jasper is really nervous about Monty and Harper's disappearance. And back outside, Clarke, Raven and the others are worried, as they haven't got any news from Bellamy.
That Bellamy (even though Clarke is the leader, and there are other important characters) has become the one "with heart" hasn't been clearer than it's in this episode. Bob Morley is a good enough actor (capable of more than just blank stares), and the show is giving him more than enough options to express emotions. Till this moment, the Mount Weather people were basically sleazy, ignorant or dangerous. In this one, through his eyes, Mount Weather people become more human than ever. Sadly, the show also uses some cheap tricks to do so, but it's a sin than can be forgiven.
But that's not the only good aspect of this episode, probably the best of the series so far. Tension is high, there's not too much action but it's greatly done, and the characters that the fan has learn to care about are given development. Probably Octavia going native is the one that's rushed the most. But "The 100" is one of those few shows which can make the viewer care about all the characters, and which offer more than just white & black situations. And this Bellamy centered one is nothing short of amazing.