HBO's hit zombie drama spent much of its second season maneuvering Ellie and Abby together. Critic Eric Deggans says it has a pacing issue that many streaming shows share.

The second season of HBO's hit zombie series takes what works the first season and turns it upside down, mining new drama from the uncertainty.

In the hit HBO show, the world has been devastated by a pandemic caused by a deadly fungus. Is that even possible? Could the next pandemic come from fungi? Turns out it's a very real question.

This species of fungus, Ophiocordyceps, is known for using "mind control" on insect hosts. Humans, however, are immune.