HBO, 9:00 p.m. ET
This show amazes me by its dizzying pace, and its ability and desire to pivot, in a second, with major plot points that most TV shows would milk for half a season. Last week, a few drops of blood from the fabled “original vampire,” Lilith, turned out to have instant transformative power, turning Bill and Eric (Stephen Moyer, Alexander Skarsgard) into, quite literally, bloodthirsty killers. Eric snapped out of it, but what’s to happen next? Especially since, in other subplots, both Russell (Denis O’Hare) and Tara (Rutina Wesley) are getting stronger and more deadly?