This is how the end begins — not with a bang, but a whimper. When we last saw our ever-harried survivors, things were going sideways both in and outside the Commonwealth, and the action picks up right where it left off. Lance Hornsby is on the warpath, Pam Milton has locked down the Commonwealth, plots are hatched, and counter-plots are hatched in response. There’s a lot going on. But much like chapter two’s lukewarm cliffhanger, this episode feels like part three’s engine is idling, not revving up.