"Hollow Men" throws Magnus--and the viewers--into the proverbial deep end of the pool, with a ton of new elements included without any explanation. It's kind of disappointing that we couldn't learn more about Hollow Earth, but the sheer amount of untapped potential is enough to keep me sated.
A quick rundown of what we now know: There seems to be a blend of mysticism with the kids being able to create holograms with balls of light in their hands; Adam seems to have a band of creepy guys who follow his orders, and he double crosses John; The city Praxis is some kind of autocracy run by Polly Walker (Caprica); Basilisks used to be on the surface but are in Hollow Earth; The mass transit system would make Europeans envious; People still farm underground and the food may have restorative properties due to increased nutrients.
The ending is pretty dumb. Obviously, everyone's not going to die, so the final shot of the four of them not moving is as hollow as Earth. The beginning of the next episode will be a big excuse about how they're not dead after all and they be right back where we were before they were shocked.
Score: 9.0/10