In war there is a lot of law bending. You can see that in the real world all the time. It's quite common to grant someone a deal to benefit from their intell or, in this case, to save hostages. It's very realistic to me.

Yeah, back in the 1500s and so, many kings started to rule by age 14-15, so it wouldn't surprise me if that was also the case with the grounders…

In the next episode, it looks like they encounter someone or something in the woods, so it could that mutant (please, let it be the mutant. I've been waiting for that storyline forever.)

Let's then hope that season 5 will be better just because there will be more time to prepare it. I don't think it will premiere until next late Spring/early Summer.