Setrakian confronts Fitzwilliam, while in the past we witness Palmer and Eichhorst's first meeting on The Strain Season 2 Episode 4. Check out the official teaser here.
Guadalupe/The Master: You failed. Gus: What? Guadalupe/The Master: Augustin Elizalde you failed. Gus: I know who you are. Guadalupe/The Master: The Ancients are the past. I am the future.