FX has set an end date for “The Strain.”

Currently in the middle of its third season, the cable network said Tuesday that the series has been renewed for a fourth and final season that will air next summer.

The series is based on the book trilogy of the same name from Guillermo del Toro and Chuck Hogan. Originally intended to run for three seasons – one for each book – showrunner Carlton Cuse said they realized they needed one more season to fully tell the story.

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“It is a true joy to work at FX where creative intentions always comes first,” said Cuse in a statement. “Our original plan was for the series to last three years. Once we began telling that story it expanded to be more. After finishing the writing on season three, Guillermo, Chuck and I looked at our remaining story and felt the best version could be told in one more season. We have a fantastic plan for an exciting and climatic season four. We are deeply grateful to FX for supporting our vision and for allowing us to end the show on our own timetable.”

In a joint statement, Nick Grad and Eric Schrier, Presidents of Original Programming, added. “Though we’re sad to see it go, we fully support the way in which they are crafting the fourth season’s dramatic conclusion.”

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Starring Corey Stoll, David Bradley, Mia Maestro and Kevin Durand, “The Strain” airs Sunday nights at 10 p.m.