ATTENTION TV VIEWERS: If you only watch the FX series on television it's probably a good idea to browse carefully as this wikia covers the books, comics and the TV show. This means MAY CONTAIN SPOILERS that is if the show decides to directly mirror the books, which isn't always the case. Happy Hunting!
UPDATE: Ben Hyland who played Eph's son Zach in season 1 has been replaced by Max Charles (The Amazing Spider-Man, American Sniper). The Strain's showrunner and executive producer Carlton Cuse made a statement about the recasting, noting that the reason why he decided to find a new actor for the role was due to the fact that Zach will have a "deeply emotional storyline" in season two and the producers needed a young actor who had the range to accommodate such a shift.