The Master’s offer to return Zack plagues Eph as he considers taking it. Dutch reunites with an old group of friends but begins to question if her safety is better with them or with Fet, Eph and Setrakian. Palmer strives for answers to Setrakian’s secret strigoi blood treatments and discovers he may have a way to acquire it.

The Strain airs Sundays at 10 PM on FX.