'The Strain' season 3 episode 7 spoilers: Is New York City heading for an imminent downfall?

The battle to take Manhattan back seemed to have succeeded for the few glorious seconds that Fet's (Kevin Durand) silver-infused grenades went off in a nest of a thousand strigoi underneath Central Park.
But then, a couple thousands more began pouring in above ground, and just like that, the tables were once again turned.
When councilwoman Feraldo (Samantha Mathis) called her men to withdraw, she knew it wasn't only this particular fight that they were backing down from.
She did not anticipate the strigoi's retaliation to be this fast and this big. When she turned to Capt. Kowalski (Paulino Nunes) and said, "It's over," it was with a deep and painful understanding that she was all out of cards to play.
But is she really? With barely 10 episodes left in the season and Eph (Corey Stoll) and Dutch (Ruta Gedmintas) still hard at work in perfecting a device that can intercept the psychic communication of the entire strigoi populace, there may still be hope for humans to make one final stand.
In the next episode of "The Strain" titled, "Collaborators," Professor Setrakian (David Bradley) will prove that he has not spent his entire life haunting these creatures down for nothing, according to a brief episode summary from TV Guide.
There is a way to defeat the Master, as what he and Quinlan have previously discovered from the Occido Lumen. Everybody has been so fixated on the idea that the Master should be killed, that trapping him forever in a silver-lined sarcophagus has never occurred to them.
The Lumen claims that this has already been done before. Setrakian seems to be all set to adopt this plan in episode 8, titled "White Light." The episode will see him and Fet raiding an Egyptian vessel, presumably in search of a sarcophagus.
The humans also still have the Born, Quinlan (Rupert Penry-Jones), on their side. Stoneheart's dying CEO, Palmer (Jonathan Hyde) seems desperate enough for the White to make good on his deal with Setrakian to find out whose body the Master is now inhabiting.
Meanwhile, Eichhorst (Richard Sammel) left both Eph and the viewers a lot to think about when he said that Zach was a special boy. With the way they had been taking care of Eph's son, trying their best to turn them to their side, could the Master be gearing Zach up to be his new host?
Spoiler TV posted the preview for "The Strain" season 3 episode 7, which will air on Sunday, Oct. 9 at 10 p.m. EDT on FX. Previous seasons of the show are also available for streaming on Hulu for U.S. residents.
In other news, Slash Film reported that "The Strain" has just been renewed for a fourth season, which will also be its last.
Executive producer Carlton Cuse said the decision was favorable since it would allow him and his team of writers to conclude the series on their own terms. It is still unknown how many episodes the fourth season will have.