Ep 4. Batch 47

In Z Nation season 2 episode 4, titled Batch 47, the group encounters a new type of zombie called "Talkers" who seem to be able to communicate with each other and potentially plan attacks. Meanwhile, they stumble upon a government facility that was testing a new experimental vaccine, Batch 47, and decide to investigate.

The team splits up, with Murphy and Addy going to explore the facility while the rest of the group stays outside to keep watch. Murphy, as the only immune survivor of the zombie virus, is intrigued by the idea of a potential cure. As they explore the facility, they come across some Talkers who seem to be much more intelligent than the usual mindless zombies. They soon discover that these Talkers were once human test subjects who were given Batch 47.

Meanwhile, the rest of the group outside has to fend off a horde of zombies, and it becomes clear that the Talkers are the ones leading the attack. They start to question whether the vaccine is truly a cure or if it's actually making things worse.

As Murphy and Addy investigate further, they learn that Batch 47 was actually developed as a bioweapon, a serum created to turn soldiers into super soldiers. The experiment went wrong and turned the subjects into Talkers instead. They also come across a group of survivors who are guarding the facility and plan to use the vaccine to create their own army of super soldiers to take over the post-apocalyptic world.

The episode culminates in a tense standoff between the group and the survivors as they fight to control the Batch 47 vaccine. There are several twists and turns in the plot, including a shocking betrayal and a surprising sacrifice.

Overall, Batch 47 is a thrilling episode that introduces new elements to the show's mythology and raises the stakes for the group. It's a solid installment that keeps the tension high and delivers some surprising moments. Fans of the series will definitely want to tune in to see how it all plays out.