Unnatural Selection is one of those episodes that misses by focusing on the wrong thing. Yes, a disease that accelerates aging is interesting and seems like the obvious choice for good scifi drama, but the real story was with the genetically engineered children experiments and the scientists who thought it was somehow a good idea to create a “super human”. Theu should have focused on the moral and ethical failings of the scientists, not the symptoms of their folly. Still, even a miss in season 2 is a leap forward over nearly anything from season 1.