Plot summary
After the Navy SEALS leave New York, Fet has a one-night stand with a woman named Kate. Eph rejoins Fet and Setrakian, who are pleased to see him. Quinlan, however, suspects Eph has ulterior motives. As Palmer's health deteriorates, he has his researchers attempt to replicate the "white", the Master's rejuvenating essence. When they fail, he meets with Setrakian and offers to abandon the Master in exchange for the "white" formula. Setrakian refuses, and later tells Fet they may be able to use Palmer's desperation to manipulate him. Eichhorst tells Palmer to influence Justine Feraldo to funnel more victims into the Freedom Centers.
Meanwhile, Dutch has fallen in with her old hacker friends who abandon her during a strigoi attack. As Zach attempts to escape the Master's confines, he glimpses Kelly feeding, then, panicked, suffers an asthma attack. The Master treats him with the "white." Quinlan catches Eph attempting to steal the Occido Lumen. Quinlan proposes teaming up to lure the Master with the Lumen so that Quinlan can kill him and Eph can rescue Zach.
Credits
Adapted from Wikipedia contributors, List of The Strain episodes. HTML formatting and reference markers removed.