So Neville beats the crap out of Danny and he doesn't even have a tiny scratch the next day?
We also learned that there are 12 rings - I mean amulets. I still wait for the one amulet to rule them all. I'm sure they must take them to a secret army facility deep in the underground, to recover the energy.
But the biggest mystery of the show is not the lack of energy, it is the lack of any intelligence. All characters continue to show us that everyone is stupid in this world and just acts like an animal because everyone is angry at somebody else and can't act smart anymore because of this. Maybe some chemicals in the water? They should solve this issue first, the energy is easy then.
Most importantly: PLEASE, someone kill Charlie!